Add unit converter

This closes #197
2025-02-19 21:10:39 +01:00 · 2023-09-11 11:16:47 +02:00 · 2023-09-11 11:16:47 +02:00 · 7df4f4e643
commit 7df4f4e643
parent 2f82019b59
72 changed files with 3351 additions and 38 deletions
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@ -34,6 +34,10 @@
            android:name=".activities.MainActivity"
            android:exported="false" />

+        <activity
+            android:name=".activities.UnitConverterActivity"
+            android:exported="false" />
+
        <activity
            android:name=".activities.WidgetConfigureActivity"
            android:exported="true"
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt
@ -137,6 +137,7 @@ class MainActivity : SimpleActivity(), Calculator {
            when (menuItem.itemId) {
                R.id.history -> showHistory()
                R.id.more_apps_from_us -> launchMoreAppsFromUsIntent()
+                R.id.unit_converter -> launchUnitConverter()
                R.id.settings -> launchSettings()
                R.id.about -> launchAbout()
                else -> return@setOnMenuItemClickListener false
@ -174,6 +175,11 @@ class MainActivity : SimpleActivity(), Calculator {
        }
    }

+    private fun launchUnitConverter() {
+        hideKeyboard()
+        startActivity(Intent(applicationContext, UnitConverterActivity::class.java))
+    }
+
    private fun launchSettings() {
        hideKeyboard()
        startActivity(Intent(applicationContext, SettingsActivity::class.java))
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/activities/UnitConverterActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/activities/UnitConverterActivity.kt
@ -0,0 +1,137 @@
+package com.simplemobiletools.calculator.activities
+
+import android.os.Bundle
+import android.view.View
+import android.view.WindowManager
+import androidx.core.content.res.ResourcesCompat
+import com.simplemobiletools.calculator.BuildConfig
+import com.simplemobiletools.calculator.databinding.ActivityUnitConverterBinding
+import com.simplemobiletools.calculator.extensions.config
+import com.simplemobiletools.calculator.extensions.updateViewColors
+import com.simplemobiletools.calculator.helpers.COMMA
+import com.simplemobiletools.calculator.helpers.DOT
+import com.simplemobiletools.calculator.helpers.converters.Converter
+import com.simplemobiletools.commons.extensions.*
+import com.simplemobiletools.commons.helpers.LOWER_ALPHA_INT
+import com.simplemobiletools.commons.helpers.MEDIUM_ALPHA_INT
+import com.simplemobiletools.commons.helpers.NavigationIcon
+
+class UnitConverterActivity : SimpleActivity() {
+    private val binding by viewBinding(ActivityUnitConverterBinding::inflate)
+    private var storedTextColor = 0
+    private var vibrateOnButtonPress = true
+    private var storedUseCommaAsDecimalMark = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        isMaterialActivity = true
+        super.onCreate(savedInstanceState)
+        setContentView(binding.root)
+        appLaunched(BuildConfig.APPLICATION_ID)
+        updateMaterialActivityViews(binding.unitConverterCoordinator, null, useTransparentNavigation = false, useTopSearchMenu = false)
+        setupMaterialScrollListener(binding.nestedScrollview, binding.unitConverterToolbar)
+        storeStateVariables()
+
+        binding.viewUnitConverter.unitsTabLayout.onTabSelectionChanged(
+            tabSelectedAction = {
+                binding.viewUnitConverter.viewConverter.root.setConverter(Converter.ALL[it.id])
+            }
+        )
+        binding.viewUnitConverter.btnClear.setVibratingOnClickListener {
+            binding.viewUnitConverter.viewConverter.root.clear()
+        }
+
+        getButtonIds().forEach {
+            it.setVibratingOnClickListener { view ->
+                binding.viewUnitConverter.viewConverter.root.numpadClicked(view.id)
+            }
+        }
+
+        Converter.ALL.forEachIndexed { index, converter ->
+            binding.viewUnitConverter.unitsTabLayout.newTab()
+                .setId(index)
+                .setText(converter.nameResId)
+                .apply { binding.viewUnitConverter.unitsTabLayout.addTab(this) }
+        }
+        binding.viewUnitConverter.viewConverter.root.setConverter(Converter.ALL.first())
+    }
+
+    override fun onResume() {
+        super.onResume()
+
+        setupToolbar(binding.unitConverterToolbar, NavigationIcon.Cross)
+        binding.viewUnitConverter.unitsTabLayout.setBackgroundColor(getProperBackgroundColor())
+        binding.viewUnitConverter.viewConverter.root.updateColors()
+        if (storedTextColor != config.textColor) {
+            binding.viewUnitConverter.converterHolder.let { updateViewColors(it, getProperTextColor()) }
+        }
+
+        if (config.preventPhoneFromSleeping) {
+            window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+        }
+
+        if (storedUseCommaAsDecimalMark != config.useCommaAsDecimalMark) {
+            setupDecimalSeparator()
+        }
+
+        vibrateOnButtonPress = config.vibrateOnButtonPress
+
+        binding.viewUnitConverter.apply {
+            arrayOf(btnClear, btnDecimal).forEach {
+                it.background = ResourcesCompat.getDrawable(resources, com.simplemobiletools.commons.R.drawable.pill_background, theme)
+                it.background?.alpha = MEDIUM_ALPHA_INT
+            }
+
+            arrayOf(btn0, btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9).forEach {
+                it.background = ResourcesCompat.getDrawable(resources, com.simplemobiletools.commons.R.drawable.pill_background, theme)
+                it.background?.alpha = LOWER_ALPHA_INT
+            }
+        }
+    }
+
+    override fun onPause() {
+        super.onPause()
+        storeStateVariables()
+        if (config.preventPhoneFromSleeping) {
+            window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+        }
+    }
+
+    private fun storeStateVariables() {
+        config.apply {
+            storedTextColor = textColor
+            storedUseCommaAsDecimalMark = useCommaAsDecimalMark
+        }
+    }
+
+    private fun checkHaptic(view: View) {
+        if (vibrateOnButtonPress) {
+            view.performHapticFeedback()
+        }
+    }
+
+    private fun getButtonIds() = binding.viewUnitConverter.run {
+        arrayOf(btnDecimal, btn0, btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9)
+    }
+
+    private fun View.setVibratingOnClickListener(callback: (view: View) -> Unit) {
+        setOnClickListener {
+            callback(it)
+            checkHaptic(it)
+        }
+    }
+
+    private fun setupDecimalSeparator() {
+        var decimalSeparator = DOT
+        var groupingSeparator = COMMA
+        storedUseCommaAsDecimalMark = config.useCommaAsDecimalMark
+        if (storedUseCommaAsDecimalMark) {
+            decimalSeparator = COMMA
+            groupingSeparator = DOT
+        } else {
+            decimalSeparator = DOT
+            groupingSeparator = COMMA
+        }
+        binding.viewUnitConverter.viewConverter.root.updateSeparators(decimalSeparator, groupingSeparator)
+        binding.viewUnitConverter.btnDecimal.text = decimalSeparator
+    }
+}
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/activities/WidgetConfigureActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/activities/WidgetConfigureActivity.kt
@ -12,7 +12,6 @@ import android.widget.TextView
 import com.simplemobiletools.calculator.R
 import com.simplemobiletools.calculator.databinding.WidgetConfigBinding
 import com.simplemobiletools.calculator.extensions.config
-import com.simplemobiletools.calculator.extensions.viewBinding
 import com.simplemobiletools.calculator.helpers.MyWidgetProvider
 import com.simplemobiletools.commons.dialogs.ColorPickerDialog
 import com.simplemobiletools.commons.dialogs.FeatureLockedDialog
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/extensions/Binding.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/extensions/Binding.kt
@ -1,10 +0,0 @@
-package com.simplemobiletools.calculator.extensions
-
-import android.app.Activity
-import android.view.LayoutInflater
-import androidx.viewbinding.ViewBinding
-
-inline fun <T : ViewBinding> Activity.viewBinding(crossinline bindingInflater: (LayoutInflater) -> T) =
-    lazy(LazyThreadSafetyMode.NONE) {
-        bindingInflater.invoke(layoutInflater)
-    }
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/converters/AreaConverter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/converters/AreaConverter.kt
@ -0,0 +1,92 @@
+package com.simplemobiletools.calculator.helpers.converters
+
+import com.simplemobiletools.calculator.R
+
+object AreaConverter : Converter {
+    override val nameResId: Int = R.string.unit_area
+
+    sealed class Unit(nameResId: Int, factor: Double) : Converter.Unit(nameResId, factor) {
+        data object SquareKilometer : Unit(
+            nameResId = R.string.unit_area_square_kilometer,
+            factor = 1000000.0
+        )
+
+        data object SquareMeter : Unit(
+            nameResId = R.string.unit_area_square_meter,
+            factor = 1.0
+        )
+
+        data object SquareCentimeter : Unit(
+            nameResId = R.string.unit_area_square_centimeter,
+            factor = 0.0001
+        )
+
+        data object SquareMillimeter : Unit(
+            nameResId = R.string.unit_area_square_millimeter,
+            factor = 0.000001
+        )
+
+        data object SquareMile : Unit(
+            nameResId = R.string.unit_area_square_mile,
+            factor = 2_589_988.110336
+        )
+
+        data object SquareYard : Unit(
+            nameResId = R.string.unit_area_square_yard,
+            factor = 0.83612736
+        )
+
+        data object SquareMil : Unit(
+            nameResId = R.string.unit_area_square_mil,
+            factor = 0.00000000064516
+        )
+
+        data object SquareInch : Unit(
+            nameResId = R.string.unit_area_square_inch,
+            factor = 0.00064516
+        )
+
+        data object SquareRod : Unit(
+            nameResId = R.string.unit_area_square_rod,
+            factor = 25.29285264
+        )
+
+        data object Acre : Unit(
+            nameResId = R.string.unit_area_acre,
+            factor = 4_046.8564224
+        )
+
+        data object Are : Unit(
+            nameResId = R.string.unit_area_are,
+            factor = 100.0
+        )
+
+        data object Dunam : Unit(
+            nameResId = R.string.unit_area_dunam,
+            factor = 1000.0
+        )
+
+        data object Hectare : Unit(
+            nameResId = R.string.unit_area_hectare,
+            factor = 10_000.0
+        )
+    }
+
+    override val units: List<Unit> = listOf(
+        Unit.SquareKilometer,
+        Unit.SquareMeter,
+        Unit.SquareCentimeter,
+        Unit.SquareMillimeter,
+        Unit.SquareMile,
+        Unit.SquareYard,
+        Unit.SquareMil,
+        Unit.SquareInch,
+        Unit.SquareRod,
+        Unit.Acre,
+        Unit.Are,
+        Unit.Dunam,
+        Unit.Hectare,
+    )
+    override val defaultTopUnit: Unit = Unit.SquareKilometer
+    override val defaultBottomUnit: Unit = Unit.SquareMeter
+}
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/converters/Base.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/converters/Base.kt
@ -0,0 +1,30 @@
+package com.simplemobiletools.calculator.helpers.converters
+
+interface Converter {
+    companion object {
+        val ALL = listOf(
+            LengthConverter,
+            AreaConverter,
+            VolumeConverter
+        )
+    }
+
+    val nameResId: Int
+    val units: List<Unit>
+    val defaultTopUnit: Unit
+    val defaultBottomUnit: Unit
+
+    fun convert(from: ValueWithUnit<Unit>, to: Unit): ValueWithUnit<Unit> {
+        return ValueWithUnit(from.value * from.unit.factor / to.factor, to)
+    }
+
+    open class Unit(
+        val nameResId: Int,
+        val factor: Double
+    ) {
+
+        fun withValue(value: Double) = ValueWithUnit(value, this)
+    }
+}
+
+data class ValueWithUnit<T : Converter.Unit>(val value: Double, val unit: T)
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/converters/Converters.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/converters/Converters.kt
@ -0,0 +1,19 @@
+package com.simplemobiletools.calculator.helpers.converters
+
+object Converters {
+    val ALL = listOf(LengthConverter)
+
+    object Mass
+
+    object Temperature
+
+    object Speed
+
+    object Time
+
+    object Fuel
+
+    object Energy
+
+    object Pressure
+}
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/converters/LengthConverter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/converters/LengthConverter.kt
@ -0,0 +1,165 @@
+package com.simplemobiletools.calculator.helpers.converters
+
+import com.simplemobiletools.calculator.R
+
+object LengthConverter : Converter {
+
+    override val nameResId: Int = R.string.unit_length
+
+    sealed class Unit(nameResId: Int, factor: Double) : Converter.Unit(nameResId, factor) {
+        data object Kilometer : Unit(
+            nameResId = R.string.unit_length_kilometer,
+            factor = 1000.0
+        )
+
+        data object Hectometer : Unit(
+            nameResId = R.string.unit_length_hectometer,
+            factor = 100.0
+        )
+
+        data object Decameter : Unit(
+            nameResId = R.string.unit_length_decameter,
+            factor = 10.0
+        )
+
+        data object Meter : Unit(
+            nameResId = R.string.unit_length_meter,
+            factor = 1.0
+        )
+
+        data object Decimeter : Unit(
+            nameResId = R.string.unit_length_decimeter,
+            factor = 0.1
+        )
+
+        data object Centimeter : Unit(
+            nameResId = R.string.unit_length_centimeter,
+            factor = 0.01
+        )
+
+        data object Millimeter : Unit(
+            nameResId = R.string.unit_length_millimeter,
+            factor = 0.001
+        )
+
+        data object Micrometer : Unit(
+            nameResId = R.string.unit_length_micrometer,
+            factor = 0.000001
+        )
+
+        data object Nanometer : Unit(
+            nameResId = R.string.unit_length_nanometer,
+            factor = 0.000000001
+        )
+
+        data object Picometer : Unit(
+            nameResId = R.string.unit_length_picometer,
+            factor = 0.000000000001
+        )
+
+        data object Angstrom : Unit(
+            nameResId = R.string.unit_length_angstrom,
+            factor = 1e-10
+        )
+
+        data object Mile : Unit(
+            nameResId = R.string.unit_length_mile,
+            factor = 1_609.344
+        )
+
+        data object Chain : Unit(
+            nameResId = R.string.unit_length_chain,
+            factor = 20.1168
+        )
+
+        data object Yard : Unit(
+            nameResId = R.string.unit_length_yard,
+            factor = 0.9144
+        )
+
+        data object Foot : Unit(
+            nameResId = R.string.unit_length_foot,
+            factor = 0.3048
+        )
+
+        data object Mil : Unit(
+            nameResId = R.string.unit_length_mil,
+            factor = 0.0000254
+        )
+
+        data object Inch : Unit(
+            nameResId = R.string.unit_length_inch,
+            factor = 0.0254
+        )
+
+        data object Fathom : Unit(
+            nameResId = R.string.unit_length_fathom,
+            factor = 1.852
+        )
+
+        data object Cable : Unit(
+            nameResId = R.string.unit_length_cable,
+            factor = 185.2
+        )
+
+        data object NauticalMile : Unit(
+            nameResId = R.string.unit_length_nautical_mile,
+            factor = 1_852.0
+        )
+
+        data object Link : Unit(
+            nameResId = R.string.unit_length_link,
+            factor = 0.201168
+        )
+
+        data object Rod : Unit(
+            nameResId = R.string.unit_length_rod,
+            factor = 5.0292
+        )
+
+        data object AstronomicalUnit : Unit(
+            nameResId = R.string.unit_length_astronomical_unit,
+            factor = 1.495979e+11
+        )
+
+        data object Parsec : Unit(
+            nameResId = R.string.unit_length_parsec,
+            factor = 3.0857e+16
+        )
+
+        data object LightYear : Unit(
+            nameResId = R.string.unit_length_light_year,
+            factor = 9.4607e+15
+        )
+    }
+
+    override val units: List<Unit> = listOf(
+        Unit.Kilometer,
+        Unit.Hectometer,
+        Unit.Decameter,
+        Unit.Meter,
+        Unit.Decimeter,
+        Unit.Centimeter,
+        Unit.Millimeter,
+        Unit.Micrometer,
+        Unit.Nanometer,
+        Unit.Picometer,
+        Unit.Angstrom,
+        Unit.Mile,
+        Unit.Chain,
+        Unit.Yard,
+        Unit.Foot,
+        Unit.Mil,
+        Unit.Inch,
+        Unit.Fathom,
+        Unit.Cable,
+        Unit.NauticalMile,
+        Unit.Link,
+        Unit.Rod,
+        Unit.AstronomicalUnit,
+        Unit.Parsec,
+        Unit.LightYear
+    )
+    override val defaultTopUnit: Unit = Unit.Kilometer
+    override val defaultBottomUnit: Unit = Unit.Meter
+}
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/converters/VolumeConverter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/converters/VolumeConverter.kt
@ -0,0 +1,92 @@
+package com.simplemobiletools.calculator.helpers.converters
+
+import com.simplemobiletools.calculator.R
+
+object VolumeConverter : Converter {
+    override val nameResId: Int = R.string.unit_volume
+
+    sealed class Unit(nameResId: Int, factor: Double) : Converter.Unit(nameResId, factor) {
+        data object SquareKilometer : Unit(
+            nameResId = R.string.unit_length_kilometer,
+            factor = 1000000.0
+        )
+
+        data object SquareMeter : Unit(
+            nameResId = R.string.unit_length_meter,
+            factor = 1.0
+        )
+
+        data object SquareCentimeter : Unit(
+            nameResId = R.string.unit_length_centimeter,
+            factor = 0.0001
+        )
+
+        data object SquareMillimeter : Unit(
+            nameResId = R.string.unit_length_millimeter,
+            factor = 0.000001
+        )
+
+        data object SquareMile : Unit(
+            nameResId = R.string.unit_length_mile,
+            factor = 2_589_988.110336
+        )
+
+        data object SquareYard : Unit(
+            nameResId = R.string.unit_length_yard,
+            factor = 0.83612736
+        )
+
+        data object SquareMil : Unit(
+            nameResId = R.string.unit_length_mil,
+            factor = 0.00000000064516
+        )
+
+        data object SquareInch : Unit(
+            nameResId = R.string.unit_length_inch,
+            factor = 0.00064516
+        )
+
+        data object SquareRod : Unit(
+            nameResId = R.string.unit_length_rod,
+            factor = 25.29285264
+        )
+
+        data object Acre : Unit(
+            nameResId = R.string.unit_length_astronomical_unit,
+            factor = 4_046.8564224
+        )
+
+        data object Are : Unit(
+            nameResId = R.string.unit_length_parsec,
+            factor = 100.0
+        )
+
+        data object Dunam : Unit(
+            nameResId = R.string.unit_length_parsec,
+            factor = 1000.0
+        )
+
+        data object Hectare : Unit(
+            nameResId = R.string.unit_length_light_year,
+            factor = 10_000.0
+        )
+    }
+
+    override val units: List<Unit> = listOf(
+        Unit.SquareKilometer,
+        Unit.SquareMeter,
+        Unit.SquareCentimeter,
+        Unit.SquareMillimeter,
+        Unit.SquareMile,
+        Unit.SquareYard,
+        Unit.SquareMil,
+        Unit.SquareInch,
+        Unit.SquareRod,
+        Unit.Acre,
+        Unit.Are,
+        Unit.Dunam,
+        Unit.Hectare,
+    )
+    override val defaultTopUnit: Unit = Unit.SquareKilometer
+    override val defaultBottomUnit: Unit = Unit.SquareMeter
+}
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/views/ConverterView.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/views/ConverterView.kt
@ -0,0 +1,192 @@
+package com.simplemobiletools.calculator.views
+
+import android.app.Activity
+import android.content.Context
+import android.content.res.ColorStateList
+import android.util.AttributeSet
+import android.view.View
+import android.widget.LinearLayout
+import androidx.core.widget.TextViewCompat
+import com.simplemobiletools.calculator.R
+import com.simplemobiletools.calculator.databinding.ViewConverterBinding
+import com.simplemobiletools.calculator.helpers.COMMA
+import com.simplemobiletools.calculator.helpers.DOT
+import com.simplemobiletools.calculator.helpers.NumberFormatHelper
+import com.simplemobiletools.calculator.helpers.converters.Converter
+import com.simplemobiletools.commons.dialogs.RadioGroupDialog
+import com.simplemobiletools.commons.extensions.applyColorFilter
+import com.simplemobiletools.commons.extensions.getProperPrimaryColor
+import com.simplemobiletools.commons.extensions.getProperTextColor
+import com.simplemobiletools.commons.models.RadioItem
+import me.grantland.widget.AutofitHelper
+import kotlin.reflect.KMutableProperty0
+
+class ConverterView @JvmOverloads constructor(
+    context: Context, attrs: AttributeSet? = null
+) : LinearLayout(context, attrs) {
+
+    private lateinit var binding: ViewConverterBinding
+
+    private var converter: Converter? = null
+    private var topUnit: Converter.Unit? = null
+    private var bottomUnit: Converter.Unit? = null
+
+    private var decimalSeparator: String = DOT
+    private var groupingSeparator: String = COMMA
+    private val formatter = NumberFormatHelper(
+        decimalSeparator = decimalSeparator, groupingSeparator = groupingSeparator
+    )
+
+    override fun onFinishInflate() {
+        super.onFinishInflate()
+        binding = ViewConverterBinding.bind(this)
+
+        AutofitHelper.create(binding.topUnitText)
+        AutofitHelper.create(binding.bottomUnitText)
+
+        binding.swapButton.setOnClickListener { switch() }
+
+        binding.topUnitName.setClickListenerForUnitSelector(::topUnit, ::bottomUnit)
+        binding.bottomUnitName.setClickListenerForUnitSelector(::bottomUnit, ::topUnit)
+
+        updateColors()
+    }
+
+    fun setConverter(converter: Converter) {
+        this.converter = converter
+        topUnit = converter.defaultTopUnit
+        bottomUnit = converter.defaultBottomUnit
+
+        binding.topUnitText.text = "1"
+        updateBottomValue()
+        updateUnitLabels()
+    }
+
+    fun updateColors() {
+        binding.topUnitText.setTextColor(context.getProperTextColor())
+        binding.bottomUnitText.setTextColor(context.getProperTextColor())
+        binding.topUnitName.setTextColor(context.getProperTextColor())
+        binding.bottomUnitName.setTextColor(context.getProperTextColor())
+        TextViewCompat.setCompoundDrawableTintList(
+            binding.topUnitName,
+            ColorStateList.valueOf(context.getProperPrimaryColor())
+        )
+        TextViewCompat.setCompoundDrawableTintList(
+            binding.bottomUnitName,
+            ColorStateList.valueOf(context.getProperPrimaryColor())
+        )
+
+        binding.swapButton.applyColorFilter(context.getProperPrimaryColor())
+    }
+
+    fun clear() {
+        binding.topUnitText.text = "0"
+        binding.bottomUnitText.text = "0"
+    }
+
+    fun numpadClicked(id: Int) {
+        when (id) {
+            R.id.btn_decimal -> decimalClicked()
+            R.id.btn_0 -> zeroClicked()
+            R.id.btn_1 -> addDigit(1)
+            R.id.btn_2 -> addDigit(2)
+            R.id.btn_3 -> addDigit(3)
+            R.id.btn_4 -> addDigit(4)
+            R.id.btn_5 -> addDigit(5)
+            R.id.btn_6 -> addDigit(6)
+            R.id.btn_7 -> addDigit(7)
+            R.id.btn_8 -> addDigit(8)
+            R.id.btn_9 -> addDigit(9)
+        }
+
+        updateBottomValue()
+    }
+
+    private fun decimalClicked() {
+        var value = binding.topUnitText.text.toString()
+        if (!value.contains(decimalSeparator)) {
+            when (value) {
+                "0" -> value = "0$decimalSeparator"
+                "" -> value += "0$decimalSeparator"
+                else -> value += decimalSeparator
+            }
+
+            binding.topUnitText.text = value
+        }
+    }
+
+    private fun zeroClicked() {
+        val value = binding.topUnitText.text
+        if (value != "0" || value.contains(decimalSeparator)) {
+            addDigit(0)
+        }
+    }
+
+    private fun addDigit(digit: Int) {
+        var value = binding.topUnitText.text.toString()
+        if (value == "0") {
+            value = ""
+        }
+
+        value += digit
+        value = formatter.addGroupingSeparators(value)
+        binding.topUnitText.text = value
+    }
+
+    private fun switch() {
+        binding.topUnitText.text.also {
+            binding.topUnitText.text = binding.bottomUnitText.text
+            binding.bottomUnitText.text = it
+        }
+
+        ::topUnit.swapWith(::bottomUnit)
+    }
+
+    private fun updateUnitLabels() {
+        binding.topUnitName.text = topUnit?.nameResId?.let { context.getString(it) }
+        binding.bottomUnitName.text = bottomUnit?.nameResId?.let { context.getString(it) }
+    }
+
+    private fun updateBottomValue() {
+        converter?.apply {
+            val converted = convert(topUnit!!.withValue(formatter.removeGroupingSeparator(binding.topUnitText.text.toString()).toDouble()), bottomUnit!!).value
+            binding.bottomUnitText.text = formatter.doubleToString(converted)
+        }
+    }
+
+    fun updateSeparators(decimalSeparator: String, groupingSeparator: String) {
+        if (this.decimalSeparator != decimalSeparator || this.groupingSeparator != groupingSeparator) {
+            this.decimalSeparator = decimalSeparator
+            this.groupingSeparator = groupingSeparator
+            formatter.decimalSeparator = decimalSeparator
+            formatter.groupingSeparator = groupingSeparator
+            binding.topUnitText.text = "0"
+            binding.bottomUnitText.text = "0"
+        }
+    }
+
+    private fun <T> KMutableProperty0<T>.swapWith(other: KMutableProperty0<T>) {
+        this.get().also {
+            this.set(other.get())
+            other.set(it)
+        }
+    }
+
+    private fun View.setClickListenerForUnitSelector(propertyToChange: KMutableProperty0<Converter.Unit?>, otherProperty: KMutableProperty0<Converter.Unit?>) {
+        setOnClickListener {
+            val items = ArrayList(converter!!.units.mapIndexed { index, unit ->
+                RadioItem(index, context.getString(unit.nameResId), unit)
+            })
+            RadioGroupDialog(context as Activity, items) {
+                val unit = it as Converter.Unit
+                if (unit == otherProperty.get()) {
+                    switch()
+                } else if (unit != propertyToChange.get()) {
+                    propertyToChange.set(unit)
+                    updateBottomValue()
+                }
+                updateUnitLabels()
+            }
+        }
+    }
+}
--- a/app/src/main/res/drawable/ic_arrow_drop_down_vector.xml
+++ b/app/src/main/res/drawable/ic_arrow_drop_down_vector.xml
@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M7,10l5,5 5,-5z"/>
+</vector>
--- a/app/src/main/res/drawable/ic_square_foot_vector.xml
+++ b/app/src/main/res/drawable/ic_square_foot_vector.xml
@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M17.66,17.66l-1.06,1.06l-0.71,-0.71l1.06,-1.06l-1.94,-1.94l-1.06,1.06l-0.71,-0.71l1.06,-1.06l-1.94,-1.94l-1.06,1.06l-0.71,-0.71l1.06,-1.06L9.7,9.7l-1.06,1.06l-0.71,-0.71l1.06,-1.06L7.05,7.05L5.99,8.11L5.28,7.4l1.06,-1.06L4,4v14c0,1.1 0.9,2 2,2h14L17.66,17.66zM7,17v-5.76L12.76,17H7z"/>
+</vector>
--- a/app/src/main/res/drawable/ic_swap_vertical_vector.xml
+++ b/app/src/main/res/drawable/ic_swap_vertical_vector.xml
@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M16,17.01V10h-2v7.01h-3L15,21l4,-3.99h-3zM9,3L5,6.99h3V14h2V6.99h3L9,3z"/>
+</vector>
--- a/app/src/main/res/layout/activity_unit_converter.xml
+++ b/app/src/main/res/layout/activity_unit_converter.xml
@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/unit_converter_coordinator"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    tools:context="com.simplemobiletools.calculator.activities.UnitConverterActivity"
+    tools:ignore="HardcodedText">
+
+    <com.google.android.material.appbar.MaterialToolbar
+        android:id="@+id/unit_converter_toolbar"
+        android:layout_width="match_parent"
+        android:layout_height="?attr/actionBarSize"
+        android:background="@color/color_primary"
+        app:titleTextAppearance="@style/AppTheme.ActionBar.TitleTextStyle" />
+
+    <androidx.core.widget.NestedScrollView
+        android:id="@+id/nested_scrollview"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginTop="?attr/actionBarSize"
+        android:fillViewport="true"
+        android:scrollbars="none">
+
+        <include
+            android:id="@+id/view_unit_converter"
+            layout="@layout/view_unit_converter"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" />
+
+    </androidx.core.widget.NestedScrollView>
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
--- a/app/src/main/res/layout/view_converter.xml
+++ b/app/src/main/res/layout/view_converter.xml
@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.simplemobiletools.calculator.views.ConverterView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/top_unit_name"
+        android:layout_width="wrap_content"
+        android:layout_height="0dp"
+        android:layout_marginTop="@dimen/small_margin"
+        android:layout_marginBottom="@dimen/small_margin"
+        android:layout_marginStart="@dimen/activity_margin"
+        android:layout_weight="1"
+        android:textSize="@dimen/big_text_size"
+        app:drawableEndCompat="@drawable/ic_arrow_drop_down_vector" />
+
+    <TextView
+        android:id="@+id/top_unit_text"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:singleLine="true"
+        android:textAlignment="viewEnd"
+        android:layout_weight="2"
+        android:textSize="@dimen/display_text_size" />
+
+    <ImageView
+        android:id="@+id/swap_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:importantForAccessibility="no"
+        android:padding="@dimen/activity_margin"
+        android:layout_weight="0.5"
+        android:src="@drawable/ic_swap_vertical_vector" />
+
+    <TextView
+        android:id="@+id/bottom_unit_name"
+        android:layout_width="wrap_content"
+        android:layout_height="0dp"
+        android:layout_gravity="start|center_vertical"
+        android:layout_marginStart="@dimen/activity_margin"
+        android:layout_marginBottom="@dimen/small_margin"
+        android:layout_weight="1"
+        android:textSize="@dimen/big_text_size"
+        app:drawableEndCompat="@drawable/ic_arrow_drop_down_vector" />
+
+    <TextView
+        android:id="@+id/bottom_unit_text"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:singleLine="true"
+        android:textAlignment="viewEnd"
+        android:layout_weight="2"
+        android:textSize="@dimen/display_text_size" />
+
+</com.simplemobiletools.calculator.views.ConverterView>
--- a/app/src/main/res/layout/view_unit_converter.xml
+++ b/app/src/main/res/layout/view_unit_converter.xml
@ -0,0 +1,151 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/converter_holder"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:hapticFeedbackEnabled="true"
+    android:layoutDirection="ltr"
+    android:orientation="vertical"
+    tools:ignore="HardcodedText">
+
+    <com.google.android.material.tabs.TabLayout
+        android:id="@+id/units_tab_layout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+    <include
+        android:id="@+id/view_converter"
+        layout="@layout/view_converter"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="1.5"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="2"
+        android:orientation="horizontal">
+
+        <TextView
+            android:id="@+id/btn_7"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="7" />
+
+        <TextView
+            android:id="@+id/btn_8"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="8" />
+
+        <TextView
+            android:id="@+id/btn_9"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="9" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="2"
+        android:orientation="horizontal">
+
+        <TextView
+            android:id="@+id/btn_4"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="4" />
+
+        <TextView
+            android:id="@+id/btn_5"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="5" />
+
+        <TextView
+            android:id="@+id/btn_6"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="6" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="2"
+        android:orientation="horizontal">
+
+        <TextView
+            android:id="@+id/btn_1"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="1" />
+
+        <TextView
+            android:id="@+id/btn_2"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="2" />
+
+        <TextView
+            android:id="@+id/btn_3"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="3" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="2"
+        android:orientation="horizontal">
+
+        <TextView
+            android:id="@+id/btn_0"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="0" />
+
+        <TextView
+            android:id="@+id/btn_decimal"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="." />
+
+        <TextView
+            android:id="@+id/btn_clear"
+            style="@style/MyButton"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:text="C" />
+    </LinearLayout>
+</LinearLayout>
--- a/app/src/main/res/menu/menu.xml
+++ b/app/src/main/res/menu/menu.xml
@ -8,6 +8,11 @@
        android:icon="@drawable/ic_clock_vector"
        android:title="@string/history"
        app:showAsAction="always" />
+    <item
+        android:id="@+id/unit_converter"
+        android:icon="@drawable/ic_square_foot_vector"
+        android:title="@string/unit_converter"
+        app:showAsAction="always" />
    <item
        android:id="@+id/settings"
        android:icon="@drawable/ic_settings_cog_vector"
--- a/app/src/main/res/values-ar/strings.xml
+++ b/app/src/main/res/values-ar/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">الحاسبة البسيطة</string>
    <string name="app_launcher_name">الحاسبة</string>
    <string name="scientific_calculator">الحاسبة العلمية</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">خطأ: القسمة على صفر</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">الاهتزاز عند الضغط على الازرار</string>
    <string name="use_comma_as_decimal_mark">استخدام الفاصلة كعلامة عشرية</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">كيف يعمل الزر C (مسح)؟</string>
    <string name="faq_1_text">النقر على ذلك سوف يزيل حرف واحد في وقت واحد. الضغط لفترة طويلة سوف إعادة تعيين جميع الحقول في وقت واحد.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-az/strings.xml
+++ b/app/src/main/res/values-az/strings.xml
@ -2,6 +2,7 @@
    <string name="app_name">Sadə Kalkulyator</string>
    <string name="app_launcher_name">Kalkulyator</string>
    <string name="scientific_calculator">Scientific Calculator</string>
+    <string name="unit_converter">Unit converter</string>

    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Səhv: sıfıra bölünmə</string>
@ -15,6 +16,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Düyməyə basdıqda titrə</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>

    <!-- FAQ -->
    <string name="faq_1_title">C (Sil) düyməsi necə işləyir?</string>
--- a/app/src/main/res/values-be/strings.xml
+++ b/app/src/main/res/values-be/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simple Calculator</string>
    <string name="app_launcher_name">Калькулятар</string>
    <string name="scientific_calculator">Навуковы калькулятар</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Памылка: дзяленне на нуль</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Вібраваць пры націску на кнопкі</string>
    <string name="use_comma_as_decimal_mark">Выкарыстоўваць коску ў якасці дзесятковага падзельніка</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Як працуе кнопка C (Ачыстка)\?</string>
    <string name="faq_1_text">Крананне да яе выдаляе адзін сімвал. Доўгае націсканне на яе ачышчае адразу ўсе палі.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-bg/strings.xml
+++ b/app/src/main/res/values-bg/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Обикновен Калкулатор</string>
    <string name="app_launcher_name">Калкулатор</string>
    <string name="scientific_calculator">Научен калкулатор</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Грешка: деление на нула</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Вибриране при натискане на бутоните</string>
    <string name="use_comma_as_decimal_mark">Използване на запетая като десетичен знак</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Как работи бутонът C (Clear)\?</string>
    <string name="faq_1_text">Натискането му ще премахва по един символ. Дълго натискане ще изчисти наведнъж всички полета.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-ca/strings.xml
+++ b/app/src/main/res/values-ca/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simple Calculator</string>
    <string name="app_launcher_name">Calculadora</string>
    <string name="scientific_calculator">Calculadora científica</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Error: divisió per zero</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibra en prémer els botons</string>
    <string name="use_comma_as_decimal_mark">Utilitza la coma com a marca decimal</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Com funciona el botó C (Esborra)\?</string>
    <string name="faq_1_text">En tocar-lo, s\'eliminarà un caràcter a la vegada. Si el premeu prolongadament, es reiniciaran tots els camps de cop.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-cs/strings.xml
+++ b/app/src/main/res/values-cs/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Jednoduchá kalkulačka</string>
    <string name="app_launcher_name">Kalkulačka</string>
    <string name="scientific_calculator">Vědecká kalkulačka</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Chyba: dělení nulou</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrovat při stisku tlačítka</string>
    <string name="use_comma_as_decimal_mark">Použít čárku jako oddělovač desetin</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Jak funguje tlačítko C?</string>
    <string name="faq_1_text">Stisknutím odmažete jeden znak. Dlouhým podržením smažete naráz všechna pole.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-cy/strings.xml
+++ b/app/src/main/res/values-cy/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simple Calculator</string>
    <string name="app_launcher_name">Cyfrifiannell</string>
    <string name="scientific_calculator">Cyfrifiannell Gwyddonol</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Gwall: rhannu â sero</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Dirgrynu wrth wasgu botymau</string>
    <string name="use_comma_as_decimal_mark">Defnyddio atalnod fel pwynt degol</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Sut mae\'r botwm C (clirio) yn gweithio?</string>
    <string name="faq_1_text">Mae ei dapio yn tynnu un rhif ar y tro. Mae ei dal yn ailosod pob maes gyda\'i gilydd ar unwaith.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-da/strings.xml
+++ b/app/src/main/res/values-da/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simpel lommeregner</string>
    <string name="app_launcher_name">Lommeregner</string>
    <string name="scientific_calculator">Videnskabelig lommeregner</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Fejl: division med nul</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrer ved knaptryk</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Hvordan virker knappen C (Slet)\?</string>
    <string name="faq_1_text">Hvis du trykker på det, fjernes et tegn ad gangen. Langt tryk vil nulstille alle felter på én gang.</string>
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Schlichter Rechner</string>
    <string name="app_launcher_name">Rechner</string>ng&gt;
    <string name="scientific_calculator">Wissenschaftlicher Rechner</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Fehler: Division durch Null</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Bei Tastendruck vibrieren</string>
    <string name="use_comma_as_decimal_mark">Komma als Dezimaltrennzeichen verwenden</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Wie funktioniert die C-Taste (Löschen)\?</string>
    <string name="faq_1_text">Bei einmaliger Berührung wird ein Zeichen entfernt. Bei langer Berührung werden alle Felder zurück gesetzt.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-el/strings.xml
+++ b/app/src/main/res/values-el/strings.xml
@ -2,6 +2,7 @@
    <string name="app_name">Απλή Αριθμομηχανή</string>
    <string name="app_launcher_name">Αριθμομηχανή</string>
    <string name="scientific_calculator">Επιστημονική Αριθμομηχανή</string>
+    <string name="unit_converter">Unit converter</string>

    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Σφάλμα: διαίρεση με μηδέν</string>
@ -15,6 +16,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Δόνηση στο πάτημα πλήκτρου</string>
    <string name="use_comma_as_decimal_mark">Χρήση κόμματος ως δεκαδικό σημείο</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>

    <!-- FAQ -->
    <string name="faq_1_title">Πώς λειτουργεί το κουμπί C (Καθαρισμός);</string>
--- a/app/src/main/res/values-eo/strings.xml
+++ b/app/src/main/res/values-eo/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simpla Kalkulilo</string>
    <string name="app_launcher_name">Kalkulilo</string>
    <string name="scientific_calculator">Sciena kalkulilo</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Eraro: divido per nul</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrigi je butonpremo</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Kiel funkcias la butono C («Forviŝi»)\?</string>
    <string name="faq_1_text">Frapetado sur ĝi forviŝos signojn po unu por frapeto. Longa premado forviŝos ĉiujn kampojn samtempe.</string>
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simple Calculator</string>
    <string name="app_launcher_name">Calculadora</string>
    <string name="scientific_calculator">Calculadora científica</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Error: división por cero</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrar al presionar un botón</string>
    <string name="use_comma_as_decimal_mark">Usar una coma como marca decimal</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">¿Cómo funciona el botón C (Borrar)\?</string>
    <string name="faq_1_text">Presionándolo una vez eliminará un solo carácter. Mantenerlo presionado reiniciará todos los campos.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-et/strings.xml
+++ b/app/src/main/res/values-et/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Lihtne kalkulaator</string>
    <string name="app_launcher_name">Kalkulaator</string>
    <string name="scientific_calculator">Teadusrežiim</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Viga: nulliga jagamine</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Nupuvajutusel vibreeri</string>
    <string name="use_comma_as_decimal_mark">Kasutage koma kui kümnendmärki</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Kuidas C (Clear) nupp toimib\?</string>
    <string name="faq_1_text">Üks klõpsatus kustutab ühe numbri. Pikk vajutus eemaldab kogu sisestuse.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-fi/strings.xml
+++ b/app/src/main/res/values-fi/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Yksinkertainen laskin</string>
    <string name="app_launcher_name">Laskin</string>
    <string name="scientific_calculator">Funktiolaskin</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Virhe: jako nollalla</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Värähdä painikkeista</string>
    <string name="use_comma_as_decimal_mark">Käytä pilkkua desimaalierottimena</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Miten C (Tyhjennä) -painike toimii\?</string>
    <string name="faq_1_text">Sen napautus poistaa yhden merkin kerrallaan ja pitkä painallus tyhjentää kaikki kentät.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-fil/strings.xml
+++ b/app/src/main/res/values-fil/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simpleng Calculator</string>
    <string name="app_launcher_name">Calculator</string>
    <string name="scientific_calculator">Scientific Calculator</string>
+    <string name="unit_converter">Unit converter</string>
    <string name="formula_divide_by_zero_error">Error: paghahati sa zero</string>
    <string name="history">Nakaraan</string>
    <string name="history_empty">Walang nakaraan</string>
@ -10,6 +11,48 @@
    <string name="history_cleared">Nalinis na ang nakaraan</string>
    <string name="vibrate_on_button_press">Mag-vibrate sa pagpindot</string>
    <string name="use_comma_as_decimal_mark">Gumamit ng kuwit bilang decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <string name="faq_1_title">Paano gumagana ang C (Clear) button\?</string>
    <string name="faq_1_text">Matatanggal ng isang karakter kapag pinindot ito nang isang beses. Ire-reset naman ang lahat ng mga field kapag mahabang pinindot ito.</string>
-</resources>
+</resources>
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simple Calculatrice</string>
    <string name="app_launcher_name">Calculatrice</string>
    <string name="scientific_calculator">Calculatrice scientifique</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Erreur : division par zéro</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrer lors de l\'appui sur les boutons</string>
    <string name="use_comma_as_decimal_mark">Utiliser la virgule comme séparateur décimal</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Comment fonctionne le bouton C (Effacer) \?</string>
    <string name="faq_1_text">En tapotant dessus, vous retirerez un caractère à la fois. Une pression prolongée sur le bouton réinitialisera tous les champs à la fois.</string>
--- a/app/src/main/res/values-gl/strings.xml
+++ b/app/src/main/res/values-gl/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Calculadora sinxela</string>
    <string name="app_launcher_name">Calculadora</string>
    <string name="scientific_calculator">Calculadora Científica</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Erro: división por cero</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrar ao premer nun botón</string>
    <string name="use_comma_as_decimal_mark">Usar cómaa como marca decimal</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Como funciona o botón C (Borrar)?</string>
    <string name="faq_1_text">O premer, eliminarase un carácter á vez. O premer de forma continua, restableceranse todos os campos á vez.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-hi/strings.xml
+++ b/app/src/main/res/values-hi/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">सरल कैलकुलेटर</string>
    <string name="app_launcher_name">कैलकुलेटर</string>
    <string name="scientific_calculator">वैज्ञानिक कैलकुलेटर</string>
+    <string name="unit_converter">Unit converter</string>
    <string name="formula_divide_by_zero_error">त्रुटि: शून्य से विभाजन</string>
    <string name="history">इतिहास</string>
    <string name="history_empty">इतिहास खाली है</string>
@ -10,6 +11,48 @@
    <string name="history_cleared">इतिहास साफ हो चुका है</string>
    <string name="vibrate_on_button_press">बटन प्रेस पर कंपन</string>
    <string name="use_comma_as_decimal_mark">दशमलव चिह्न के रूप में अल्पविराम का उपयोग करें</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <string name="faq_1_title">सी (क्लियर) बटन कैसे काम करता है\?</string>
    <string name="faq_1_text">इस पर टैप करने से एक बार में एक कैरेक्टर हट जाएगा। लंबे समय तक इसे दबाने से एक ही बार में सभी फ़ील्ड रीसेट हो जाएंगे।</string>
-</resources>
+</resources>
--- a/app/src/main/res/values-hr/strings.xml
+++ b/app/src/main/res/values-hr/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Jednostavan kalkulator</string>
    <string name="app_launcher_name">Kalkulator</string>
    <string name="scientific_calculator">Znanstveni kalkulator</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Greška: dijeljenje s nulom</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibriraj prilikom pritiskanja gumba</string>
    <string name="use_comma_as_decimal_mark">Koristi zarez kao decimalni znak</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Kako funkcionira gumb C (Izbriši)\?</string>
    <string name="faq_1_text">Dodirom gumba uklanjaju se znakovi jedan po jedan. Dugim pritiskom gumba obnavljaju se sva polja.</string>
--- a/app/src/main/res/values-hu/strings.xml
+++ b/app/src/main/res/values-hu/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Egyszerű számológép</string>
    <string name="app_launcher_name">Számológép</string>
    <string name="scientific_calculator">Tudományos számológép</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Hiba: nullával való osztás</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Rezgés gombnyomáskor</string>
    <string name="use_comma_as_decimal_mark">Tizedesjelként vessző használata</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Hogyan működik a C (törlés) gomb\?</string>
    <string name="faq_1_text">A koppintás egyszerre egy karaktert töröl. A hosszú lenyomás egyszerre állítja vissza az összes mezőt.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-in/strings.xml
+++ b/app/src/main/res/values-in/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simple Calculator</string>
    <string name="app_launcher_name">Kalkulator</string>
    <string name="scientific_calculator">Kalkulator Sains</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Kesalahan: pembagian dengan nol</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Getar saat tombol ditekan</string>
    <string name="use_comma_as_decimal_mark">Gunakan koma sebagai tanda desimal</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Bagaimana tombol C (Clear) bekerja?</string>
    <string name="faq_1_text">Menyentuhnya sekali akan menghapus satu karakter. Menyentuhnya lama akan mengosongkan seluruh ruas sekaligus.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-is/strings.xml
+++ b/app/src/main/res/values-is/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simple Calculator</string>
    <string name="app_launcher_name">Calculator</string>
    <string name="scientific_calculator">Vísindareiknivél</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Error: division by zero</string>
    <!-- History -->
@ -13,7 +14,49 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Titra þegar pikkað er á takka</string>
    <string name="use_comma_as_decimal_mark">Nota kommu sem tugabrotskommu</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Hvernig virkar C (Hreinsa) hnappurinn\?</string>
    <string name="faq_1_text">Með því að pikka á hann verður einn stafur fjarlægður í einu. Haltu inni til þess að endurstilla alla reiti í einu.</string>
-</resources>
+</resources>
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Calcolatrice Semplice</string>
    <string name="app_launcher_name">Calcolatrice</string>
    <string name="scientific_calculator">Calcolatrice scientifica</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Errore: divisione per zero</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibra alla pressione di un tasto</string>
    <string name="use_comma_as_decimal_mark">Usa la virgola come segno decimale</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Come funziona il tasto C (Cancella)?</string>
    <string name="faq_1_text">Premendo il tasto una volta verrà eliminato un singolo carattere; tenendolo premuto invece eliminerà tutta la stringa.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-iw/strings.xml
+++ b/app/src/main/res/values-iw/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">מחשבון פשוט</string>
    <string name="app_launcher_name">מחשבון</string>
    <string name="scientific_calculator">מחשבון מדעי</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">שגיאה: חלוקה באפס</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">רטט בעת לחיצה</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">כיצד פועל לחצן C (ניקוי)\?</string>
    <string name="faq_1_text">הקשה עליו תסיר תו אחד בכל פעם. לחיצה ארוכה עליו תאפס את כל השדות בבת אחת.</string>
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">シンプル電卓</string>
    <string name="app_launcher_name">電卓</string>
    <string name="scientific_calculator">科学計算電卓</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">エラー：ゼロによる除算</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">ボタンのタップ時に振動する</string>
    <string name="use_comma_as_decimal_mark">カンマを小数点として使う</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">C (クリア) ボタンはどのように機能しますか？</string>
    <string name="faq_1_text">ボタンをタップするたびに1文字ずつ削除されます。ボタンを長押しするとすべてのフィールドがリセットされます。</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-kn/strings.xml
+++ b/app/src/main/res/values-kn/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">ಸರಳ ಕ್ಯಾಲ್ಕುಲೇಟರ್</string>
    <string name="app_launcher_name">ಕ್ಯಾಲ್ಕುಲೇಟರ್</string>
    <string name="scientific_calculator">ವೈಜ್ಞಾನಿಕ ಕ್ಯಾಲ್ಕುಲೇಟರ್</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">ದೋಷ : ಶೂನ್ಯದಿಂದ ವಿಭಜನೆ</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrate on button press</string>
    <string name="use_comma_as_decimal_mark">ಅಲ್ಪವಿರಾಮವನ್ನು ದಶಮಾಂಶ ಚಿಹ್ನೆಯಾಗಿ ಬಳಸಿ</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">ಸಿ (ತೆರವುಗೊಳಿಸಿ) ಬಟನ್ ಹೇಗೆ ಕೆಲಸ ಮಾಡುತ್ತದೆ\?</string>
    <string name="faq_1_text">ಅದರ ಮೇಲೆ ಟ್ಯಾಪ್ ಮಾಡುವುದರಿಂದ ಒಂದು ಸಮಯದಲ್ಲಿ ಒಂದು ಅಕ್ಷರವನ್ನು ತೆಗೆದುಹಾಕಲಾಗುತ್ತದೆ. ದೀರ್ಘವಾಗಿ ಒತ್ತಿದರೆ ಎಲ್ಲಾ ಕ್ಷೇತ್ರಗಳನ್ನು ಒಂದೇ ಬಾರಿಗೆ ಮರುಹೊಂದಿಸುತ್ತದೆ.</string>
--- a/app/src/main/res/values-ko/strings.xml
+++ b/app/src/main/res/values-ko/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">간단한 계산기</string>
    <string name="app_launcher_name">계산기</string>
    <string name="scientific_calculator">과학 계산기</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">오류: 0으로 나누기</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">진동 버튼을 누릅니다</string>
    <string name="use_comma_as_decimal_mark">쉼표를 소수점으로 사용합니다</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">C(지우기) 버튼은 어떻게 작동합니까\?</string>
    <string name="faq_1_text">누르면 한 번에 한 문자씩 제거됩니다. 길게 누르면 모든 필드가 한 번에 재설정됩니다.</string>
--- a/app/src/main/res/values-kr/strings.xml
+++ b/app/src/main/res/values-kr/strings.xml
@ -2,6 +2,7 @@
    <string name="app_name">심플한 계산기</string>
    <string name="app_launcher_name">계산기</string>
    <string name="scientific_calculator">공학용 계산기</string>
+    <string name="unit_converter">Unit converter</string>

    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">에러: 공으로 나눌 할수 없어요</string>
@ -15,6 +16,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">버튼 탭시 진동</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>

    <!-- FAQ -->
    <string name="faq_1_title">C (Clear) 버튼을 어떻게 사용합니까?</string>
--- a/app/src/main/res/values-lt/strings.xml
+++ b/app/src/main/res/values-lt/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Paprastas skaičiuotuvas</string>
    <string name="app_launcher_name">Skaičiuotuvas</string>
    <string name="scientific_calculator">Mokslinis skaičiuotuvas</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Klaida: dalyba iš nulio</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibruoti, kai paspaudžiami mygtukai</string>
    <string name="use_comma_as_decimal_mark">Naudoti kablelį kaip dešimtainių dalių skirtuką</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Kaip veikia C (Išvalymo) mygtukas\?</string>
    <string name="faq_1_text">Kiekvieną kartą ant jo bakstelėjus, bus šalinama po vieną simbolį. Ilgai jį palaikius, bus iš karto atstatyti visi laukai.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-lv/strings.xml
+++ b/app/src/main/res/values-lv/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Vienkāršs kalkulators</string>
    <string name="app_launcher_name">Kalkulators</string>
    <string name="scientific_calculator">Zinātniskais kalkulators</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Kļūda: dalīšana ar nulli</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrēšana pēc pogas nospiešanas</string>
    <string name="use_comma_as_decimal_mark">Izmanto komatu kā decimālzīmi</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Kā darbojas poga C (Notīrīt)\?</string>
    <string name="faq_1_text">Pieskarieties tai, lai noņemtu vienu rakstzīmi vienlaikus. Ilgstoši nospiežot to, tiks atiestatīti visi lauki vienlaicīgi.</string>
--- a/app/src/main/res/values-mk/strings.xml
+++ b/app/src/main/res/values-mk/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Едноставен калкулатор</string>
    <string name="app_launcher_name">Калкулатор</string>
    <string name="scientific_calculator">Научен калкулатор</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Грешка: поделба по нула</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Вибрирајте на копчето притиснете</string>
    <string name="use_comma_as_decimal_mark">Користете замена како знак за децимален знак</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Како функционира копчето C (Clear) \?</string>
    <string name="faq_1_text">Прислушкувањето на него ќе отстрани еден лик во исто време. Долгото притискање ќе ги ресетира сите полиња одеднаш.</string>
--- a/app/src/main/res/values-ml/strings.xml
+++ b/app/src/main/res/values-ml/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">സിമ്പിൾ കാൽക്കുലേറ്റർ</string>
    <string name="app_launcher_name">കാൽക്കുലേറ്റർ</string>
    <string name="scientific_calculator">ശാസ്ത്രീയ കാൽക്കുലേറ്റർ</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">പിശക്: 0 കൊണ്ട് ഹരിക്കാനാവില്ല</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">ബട്ടൺ അമർത്തുമ്പോൾ വൈബ്രേറ്റ് ചെയ്യുക</string>
    <string name="use_comma_as_decimal_mark">ദശാംശ ചിഹ്നമായി കോമ(,) ഉപയോഗിക്കുക</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">C(ക്ലിയർ ) ബട്ടൺ പ്രവർത്തിക്കുന്നത് എങ്ങനെ\?</string>
    <string name="faq_1_text">ടാപ്പ് ചെയ്യുമ്പോൾ ഒരു സമയം ഒരു പ്രതീകത്തെ നീക്കംചെയ്യും. ദീർഘനേരം അമർത്തിയാൽ എല്ലാ ഫീൽഡുകളും പുനഃസജ്ജമാക്കും.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-ms/strings.xml
+++ b/app/src/main/res/values-ms/strings.xml
@ -2,6 +2,7 @@
    <string name="app_name">Kalkulator Ringkas</string>
    <string name="app_launcher_name">Kalkulator</string>
    <string name="scientific_calculator">Kalkulator Saintifik</string>
+    <string name="unit_converter">Unit converter</string>

    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Amaran: pembahagian dengan sifar</string>
@ -15,6 +16,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Getar semasa butang ditekan</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>

    <!-- FAQ -->
    <string name="faq_1_title">Bagaimana Butang C (Menghapus) Digunakan？</string>
--- a/app/src/main/res/values-nl/strings.xml
+++ b/app/src/main/res/values-nl/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Eenvoudige Rekenmachine</string>
    <string name="app_launcher_name">Rekenmachine</string>
    <string name="scientific_calculator">Wetenschappelijke Rekenmachine</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Fout: delen door nul</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Trillen bij het indrukken van toetsen</string>
    <string name="use_comma_as_decimal_mark">Komma als decimaalteken gebruiken</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Hoe werkt de knop C (Clear)\?</string>
    <string name="faq_1_text">Kort indrukken verwijdert één karakter per keer. Lang drukken wist direct alle velden.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-no-rNO/strings.xml
+++ b/app/src/main/res/values-no-rNO/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Enkel kalkulator</string>
    <string name="app_launcher_name">Kalkulator</string>
    <string name="scientific_calculator">Vitenskapelig kalkulator</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">FeiL: Deling på null</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrer ved knappetrykk</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <string name="faq_1_title">Hvordan fungerer C (Clear)-knappen\?</string>
    <string name="faq_1_text">Å trykke på den fjerner ett tegn av gangen. Lang-trykk tilbakestiller alle felter.</string>
    <!--
--- a/app/src/main/res/values-pa-rPK/strings.xml
+++ b/app/src/main/res/values-pa-rPK/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">سادہ کیلکولیٹر</string>
    <string name="app_launcher_name">کیلکولیٹر</string>
    <string name="scientific_calculator">وگیانک کیلکولیٹر</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">غلطی آئی اے، صفر نال ونڈ</string>
    <!-- History -->
@ -13,7 +14,49 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrate on button press</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">How does the C (Clear) button work\?</string>
    <string name="faq_1_text">Tapping on it will remove one character at a time. Long pressing it will reset all fields at once.</string>
-</resources>
+</resources>
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Prosty kalkulator</string>
    <string name="app_launcher_name">Kalkulator</string>
    <string name="scientific_calculator">Kalkulator naukowy</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Błąd: dzielenie przez zero</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Wibracja przy naciśnięciu przycisku</string>
    <string name="use_comma_as_decimal_mark">Używaj przecinka jako separatora dziesiętnego</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Jak działa przycisk C (Wyczyść)?</string>
    <string name="faq_1_text">Naciśnięcie go usunie jeden znak naraz. Długie naciśnięcie zresetuje wszystkie pola jednocześnie.</string>
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Calculadora Simples</string>
    <string name="app_launcher_name">Calculadora</string>
    <string name="scientific_calculator">Calculadora Científica</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Erro: divisão por zero</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrar ao pressionar um botão</string>
    <string name="use_comma_as_decimal_mark">Usar virgula como marca decimal</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Como funciona o botão C (Clear)\?</string>
    <string name="faq_1_text">Um toque remove um caractere de cada vez. Um toque longo redefine todos os campos de uma vez.</string>
--- a/app/src/main/res/values-pt/strings.xml
+++ b/app/src/main/res/values-pt/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simple Calculator</string>
    <string name="app_launcher_name">Calculadora</string>
    <string name="scientific_calculator">Calculadora científica</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Erro: divisão por zero</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrar ao tocar nos botões</string>
    <string name="use_comma_as_decimal_mark">Usar vírgula como separador decimal</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Como funciona o botão C (limpar)\?</string>
    <string name="faq_1_text">Ao tocar uma vez, os caracteres serão apagados um a um. Um toque longo apaga todos os caracteres ao mesmo tempo.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-ro/strings.xml
+++ b/app/src/main/res/values-ro/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Calculator simplu</string>
    <string name="app_launcher_name">Calculator</string>
    <string name="scientific_calculator">Calculator Ştiințific</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Eroare: împărțire la zero</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrează la apăsarea butoanelor</string>
    <string name="use_comma_as_decimal_mark">Utilizează virgula ca separator zecimal</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Cum funcționează butonul Ș (Șterge)\?</string>
    <string name="faq_1_text">Apăsând pe el, veți elimina câte un caracter pe rând. Apăsarea lungă va reseta toate câmpurile deodată.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Простой калькулятор</string>
    <string name="app_launcher_name">Калькулятор</string>
    <string name="scientific_calculator">Научный калькулятор</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Ошибка: деление на ноль</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Вибрация при нажатии кнопок</string>
    <string name="use_comma_as_decimal_mark">Использовать запятую в качестве десятичного знака</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Как работает кнопка C (Очистка)\?</string>
    <string name="faq_1_text">Нажатие на неё удалит один символ. Долгое нажатие сбросит все поля сразу.</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-sk/strings.xml
+++ b/app/src/main/res/values-sk/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Jednoduchá kalkulačka</string>
    <string name="app_launcher_name">Kalkulačka</string>
    <string name="scientific_calculator">Vedecká kalkulačka</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Chyba: delenie nulou</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrovať pri stlačení tlačidla</string>
    <string name="use_comma_as_decimal_mark">Používať čiarku na oddelenie desatinných čísel</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Ako funguje tlačidlo C?</string>
    <string name="faq_1_text">Jedným stlačením viete vymazať 1 znak. Dlhé podržanie vymaže všetky polia naraz.</string>
--- a/app/src/main/res/values-sl/strings.xml
+++ b/app/src/main/res/values-sl/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Preprost kalkulator</string>
    <string name="app_launcher_name">Kalkulator</string>
    <string name="scientific_calculator">Znanstveni kalkulator</string>
+    <string name="unit_converter">Unit converter</string>
    <string name="formula_divide_by_zero_error">Napaka: deljenje z ničlo</string>
    <string name="history">Zgodovina</string>
    <string name="history_empty">Zgodovina je prazna</string>
@ -10,6 +11,48 @@
    <string name="history_cleared">Zgodovina je bila izbrisana</string>
    <string name="vibrate_on_button_press">Vibriraj ob pritisku gumba</string>
    <string name="use_comma_as_decimal_mark">Uporabite vejico kot decimalno znamenje</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <string name="faq_1_title">Kako deluje gumb C (Clear)\?</string>
    <string name="faq_1_text">Če ga stisnete, odstranite po en lik naenkrat. Z dolgim pritiskom nanj boste odstranili vsa polja naenkrat.</string>
-</resources>
+</resources>
--- a/app/src/main/res/values-sr/strings.xml
+++ b/app/src/main/res/values-sr/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Једноставан калкулатор</string>
    <string name="app_launcher_name">Калкулатор</string>
    <string name="scientific_calculator">Научни калкулатор</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Грешка : дељење нулом</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Вибрирајте притиснути дугметом</string>
    <string name="use_comma_as_decimal_mark">Коришћење зареза као децималног знака</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Како дугме Ц (Обриши) функционише\?</string>
    <string name="faq_1_text">Додиривање на њега ће уклонити један по један знак. Дуго притискање ће успоставити почетне вредности свих поља одједном.</string>
--- a/app/src/main/res/values-sv/strings.xml
+++ b/app/src/main/res/values-sv/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simpel kalkylator</string>
    <string name="app_launcher_name">Kalkylator</string>
    <string name="scientific_calculator">Avancerad kalkylator</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Fel: delning med noll</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrera när jag trycker på knapparna</string>
    <string name="use_comma_as_decimal_mark">Använd komma som decimaltecken</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Hur funkar C (Rensa) knappen\?</string>
    <string name="faq_1_text">Om du trycker på den tar du bort ett tecken i taget. Om du trycker länge på den återställs alla fält på en gång.</string>
--- a/app/src/main/res/values-ta/strings.xml
+++ b/app/src/main/res/values-ta/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">எளிய கால்குலேட்டர்</string>
    <string name="app_launcher_name">கால்குலேட்டர்</string>
    <string name="scientific_calculator">அறிவியல் கால்குலேட்டர்</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">பிழை: பூஜ்ஜியத்தால் வகுத்தல்</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrate on button press</string>
    <string name="use_comma_as_decimal_mark">கமாவை தசம குறியாகப் பயன்படுத்தவும்</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">சி (தெளிவு) பொத்தான் எப்படி வேலை செய்கிறது\?</string>
    <string name="faq_1_text">அதைத் தட்டினால் ஒரு நேரத்தில் ஒரு எழுத்து நீக்கப்படும். நீண்ட நேரம் அழுத்தினால், எல்லாப் புலங்களையும் ஒரே நேரத்தில் மீட்டமைக்கும்.</string>
--- a/app/src/main/res/values-te/strings.xml
+++ b/app/src/main/res/values-te/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">సాధారణ కాలిక్యులేటర్</string>
    <string name="app_launcher_name">గనన యంత్రము</string>
    <string name="scientific_calculator">శాస్త్రీయ గనన యంత్రము</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">లోపం: సున్నాతో భాగించటం</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrate on button press</string>
    <string name="use_comma_as_decimal_mark">కామాను దశాంశ గుర్తుగా ఉపయోగించండి</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">C (క్లియర్) బటన్ ఎలా పని చేస్తుంది\?</string>
    <string name="faq_1_text">దానిపై నొక్కడం ద్వారా ఒక్కో అక్షరం తీసివేయబడుతుంది. ఎక్కువసేపు నొక్కితే, అన్ని ఫీల్డ్‌లు ఒకేసారి రీసెట్ చేయబడతాయి.</string>
--- a/app/src/main/res/values-th/strings.xml
+++ b/app/src/main/res/values-th/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simple Calculator</string>
    <string name="app_launcher_name">Calculator</string>
    <string name="scientific_calculator">Scientific Calculator</string>
+    <string name="unit_converter">Unit converter</string>

    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Error: division by zero</string>
@ -16,6 +17,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Vibrate on button press</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>

    <!-- FAQ -->
    <string name="faq_1_title">How does the C (Clear) button work?</string>
--- a/app/src/main/res/values-tr/strings.xml
+++ b/app/src/main/res/values-tr/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Basit Hesap Makinesi</string>
    <string name="app_launcher_name">Hesap Makinesi</string>
    <string name="scientific_calculator">Bilimsel Hesap Makinesi</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Hata: sıfıra bölme</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Düğmeye basıldığında titret</string>
    <string name="use_comma_as_decimal_mark">Ondalık işareti olarak virgül kullan</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">C (Temizle) düğmesi nasıl çalışır?</string>
    <string name="faq_1_text">Üzerine dokunmak, bir seferde bir karakteri kaldıracaktır. Uzun basma, tüm alanları bir kerede sıfırlayacaktır.</string>
--- a/app/src/main/res/values-uk/strings.xml
+++ b/app/src/main/res/values-uk/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Простий Калькулятор</string>
    <string name="app_launcher_name">Калькулятор</string>
    <string name="scientific_calculator">Науковий Калькулятор</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Помилка: ділення на нуль</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">Вібрувати з натиском кнопок</string>
    <string name="use_comma_as_decimal_mark">Як десятковий знак використовувати кому</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">Як працює кнопка C (Очистити)?</string>
    <string name="faq_1_text">Короткий натиск видалить один символ за раз. Тривалий натиск одразу очистить всі поля.</string>
--- a/app/src/main/res/values-zgh/strings.xml
+++ b/app/src/main/res/values-zgh/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">ⵜⴰⵙⵎⵙⵙⵉⴹⵏⵜ ⵜⴰⴼⵔⴰⵔⵜ</string>
    <string name="app_launcher_name">ⵜⴰⵙⵎⵙⵙⵉⴹⵏⵜ</string>
    <string name="scientific_calculator">ⵜⴰⵙⵎⵙⵙⵉⴹⵏⵜ ⵜⴰⵎⴰⵙⵙⴰⵏⵜ</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">ⵜⴰⵣⴳⵍⵜ: ⴰⴱⵟⵟⵓ ⵅⴼ ⵓⵎⵢⴰ</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">ⴰⵔⵎⵉⵎⵎⵉ ⴳ ⵡⴰⴱⴱⴰⵥ ⵅⴼ ⵜⴳⵎⵎⵓⵜⵉⵏ</string>
    <string name="use_comma_as_decimal_mark">ⵙⵎⵔⵙ ⵜⵉⵙⴽⵔⵜ ⴷ ⵜⴰⵎⴰⵜⴰⵔⵜ ⵜⴰⵎⵔⴰⵡⴰⵏⵜ</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">ⵎⴰⵎⴽ ⵜⵙⵡⵓⵔⵓⵢ ⵜⴳⵎⵎⵓⵜ C (ⴽⴽⵙ)\?</string>
    <string name="faq_1_text">ⴰⴱⴱⴰⵥ ⵅⴼ ⵓⵢⵏⵏⴰ ⴰⴷ ⵉⴽⴽⵙ ⵢⴰⵏ ⵓⵙⴽⴽⵉⵍ ⴳ ⵢⴰⵏ ⵓⵣⵎⵣ. ⵎⵛ ⵉⵍⵍⴰ ⵡⴰⴱⴱⴰⵥ ⴰⵙⵓⵍⴰⵏ ⵔⴰⴷ ⵜⵜⵓⵙⵏⴼⵍⵏ ⵎⴰⵕⵕⴰ ⵉⴳⵔⴰⵏ ⴳ ⵢⴰⵏ ⵓⵣⵎⵣ.</string>
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">简单计算器</string>
    <string name="app_launcher_name">计算器</string>
    <string name="scientific_calculator">科学计算器</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">错误: 被零除</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">按下按键后震动</string>
    <string name="use_comma_as_decimal_mark">用逗号作小数点</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">如何使用 C (清除) 按钮？</string>
    <string name="faq_1_text">点按它一次删除一个字母。长按它将立即重置所有字段。</string>
@ -20,4 +63,4 @@
        Haven't found some strings? There's more at
        https://github.com/SimpleMobileTools/Simple-Commons/tree/master/commons/src/main/res
    -->
-</resources>
+</resources>
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">簡易計算機</string>
    <string name="app_launcher_name">計算機</string>
    <string name="scientific_calculator">科學計算機</string>
+    <string name="unit_converter">Unit converter</string>
    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">錯誤：除以零</string>
    <!-- History -->
@ -13,6 +14,48 @@
    <!-- Settings -->
    <string name="vibrate_on_button_press">按下按鈕時震動</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>
+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
    <!-- FAQ -->
    <string name="faq_1_title">C（清除）按鈕如何使用？</string>
    <string name="faq_1_text">按一次會刪除一個字元。長按會馬上重設全部欄位。</string>
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@ -3,6 +3,7 @@
    <string name="app_name">Simple Calculator</string>
    <string name="app_launcher_name">Calculator</string>
    <string name="scientific_calculator">Scientific Calculator</string>
+    <string name="unit_converter">Unit converter</string>

    <!-- Calculator field -->
    <string name="formula_divide_by_zero_error">Error: division by zero</string>
@ -17,6 +18,49 @@
    <string name="vibrate_on_button_press">Vibrate on button press</string>
    <string name="use_comma_as_decimal_mark">Use comma as a decimal mark</string>

+    <!-- Unit converter -->
+    <string name="unit_length">Length</string>
+    <string name="unit_length_kilometer">Kilometer</string>
+    <string name="unit_length_hectometer">Hectometer</string>
+    <string name="unit_length_decameter">Decameter</string>
+    <string name="unit_length_meter">Meter</string>
+    <string name="unit_length_decimeter">Decimeter</string>
+    <string name="unit_length_centimeter">Centimeter</string>
+    <string name="unit_length_millimeter">Millimeter</string>
+    <string name="unit_length_micrometer">Micrometer</string>
+    <string name="unit_length_nanometer">Nanometer</string>
+    <string name="unit_length_picometer">Picometer</string>
+    <string name="unit_length_angstrom">Angstrom</string>
+    <string name="unit_length_mile">Mile</string>
+    <string name="unit_length_chain">Chain</string>
+    <string name="unit_length_yard">Yard</string>
+    <string name="unit_length_foot">Foot</string>
+    <string name="unit_length_mil">Mil</string>
+    <string name="unit_length_inch">Inch</string>
+    <string name="unit_length_fathom">Fathom</string>
+    <string name="unit_length_cable">Cable</string>
+    <string name="unit_length_nautical_mile">Nautical Mile</string>
+    <string name="unit_length_link">Link</string>
+    <string name="unit_length_rod">Rod</string>
+    <string name="unit_length_astronomical_unit">Astronomical Unit</string>
+    <string name="unit_length_parsec">Parsec</string>
+    <string name="unit_length_light_year">Light Year</string>
+    <string name="unit_area">Area</string>
+    <string name="unit_area_square_kilometer">Square Kilometer</string>
+    <string name="unit_area_square_meter">Square Meter</string>
+    <string name="unit_area_square_centimeter">Square Centimeter</string>
+    <string name="unit_area_square_millimeter">Square Millimeter</string>
+    <string name="unit_area_square_mile">Square Mile</string>
+    <string name="unit_area_square_yard">Square Yard</string>
+    <string name="unit_area_square_mil">Square Mil</string>
+    <string name="unit_area_square_inch">Square Inch</string>
+    <string name="unit_area_square_rod">Square Rod</string>
+    <string name="unit_area_acre">Acre</string>
+    <string name="unit_area_are">Are</string>
+    <string name="unit_area_dunam">Dunam</string>
+    <string name="unit_area_hectare">Hectare</string>
+    <string name="unit_volume">Volume</string>
+
    <!-- FAQ -->
    <string name="faq_1_title">How does the C (Clear) button work?</string>
    <string name="faq_1_text">Tapping on it will remove one character at a time. Long pressing it will reset all fields at once.</string>