diff --git a/app/src/main/kotlin/com/simplemobiletools/dialer/App.kt b/app/src/main/kotlin/com/simplemobiletools/dialer/App.kt
index 410409f2..4f23dada 100644
--- a/app/src/main/kotlin/com/simplemobiletools/dialer/App.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/dialer/App.kt
@@ -2,10 +2,8 @@ package com.simplemobiletools.dialer
 
 import android.app.Application
 import com.simplemobiletools.commons.extensions.checkUseEnglish
-import com.simplemobiletools.dialer.helpers.CallDurationHelper
 
 class App : Application() {
-    val callDurationHelper by lazy { CallDurationHelper() }
     override fun onCreate() {
         super.onCreate()
         checkUseEnglish()
diff --git a/app/src/main/kotlin/com/simplemobiletools/dialer/activities/CallActivity.kt b/app/src/main/kotlin/com/simplemobiletools/dialer/activities/CallActivity.kt
index 08d903e5..716f0b99 100644
--- a/app/src/main/kotlin/com/simplemobiletools/dialer/activities/CallActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/dialer/activities/CallActivity.kt
@@ -10,6 +10,7 @@ import android.graphics.drawable.RippleDrawable
 import android.media.AudioManager
 import android.os.Bundle
 import android.os.Handler
+import android.os.Looper
 import android.os.PowerManager
 import android.telecom.Call
 import android.telecom.CallAudioState
@@ -20,7 +21,6 @@ import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.MINUTE_SECONDS
 import com.simplemobiletools.commons.helpers.isOreoMr1Plus
 import com.simplemobiletools.commons.helpers.isOreoPlus
-import com.simplemobiletools.dialer.App
 import com.simplemobiletools.dialer.R
 import com.simplemobiletools.dialer.extensions.addCharacter
 import com.simplemobiletools.dialer.extensions.audioManager
@@ -48,7 +48,7 @@ class CallActivity : SimpleActivity() {
     private var proximityWakeLock: PowerManager.WakeLock? = null
     private var callDuration = 0
     private val callContactAvatarHelper by lazy { CallContactAvatarHelper(this) }
-    private val callDurationHelper by lazy { (application as App).callDurationHelper }
+    private val callDurationHandler = Handler(Looper.getMainLooper())
     private var dragDownX = 0f
     private var stopAnimation = false
 
@@ -389,14 +389,7 @@ class CallActivity : SimpleActivity() {
         initProximitySensor()
         incoming_call_holder.beGone()
         ongoing_call_holder.beVisible()
-        callDurationHelper.onDurationChange {
-            callDuration = it
-            runOnUiThread {
-                if (!isCallEnded) {
-                    call_status_label.text = callDuration.getFormattedDuration()
-                }
-            }
-        }
+        callDurationHandler.post(updateCallDurationTask)
     }
 
     private fun showPhoneAccountPicker() {
@@ -444,6 +437,16 @@ class CallActivity : SimpleActivity() {
         }
     }
 
+    private val updateCallDurationTask = object : Runnable {
+        override fun run() {
+            callDuration = CallManager.getCallDuration()
+            if (!isCallEnded) {
+                call_status_label.text = callDuration.getFormattedDuration()
+                callDurationHandler.postDelayed(this, 1000)
+            }
+        }
+    }
+
     @SuppressLint("NewApi")
     private fun addLockScreenFlags() {
         if (isOreoMr1Plus()) {
diff --git a/app/src/main/kotlin/com/simplemobiletools/dialer/helpers/CallDurationHelper.kt b/app/src/main/kotlin/com/simplemobiletools/dialer/helpers/CallDurationHelper.kt
deleted file mode 100644
index 129f9b83..00000000
--- a/app/src/main/kotlin/com/simplemobiletools/dialer/helpers/CallDurationHelper.kt
+++ /dev/null
@@ -1,34 +0,0 @@
-package com.simplemobiletools.dialer.helpers
-
-import java.util.Timer
-import java.util.TimerTask
-
-class CallDurationHelper {
-    private var callTimer: Timer? = null
-    private var callDuration = 0
-    private var callback: ((durationSecs: Int) -> Unit)? = null
-
-    fun onDurationChange(callback: (durationSecs: Int) -> Unit) {
-        this.callback = callback
-    }
-
-    fun start() {
-        try {
-            callDuration = 0
-            callTimer = Timer()
-            callTimer?.scheduleAtFixedRate(getTimerUpdateTask(), 1000, 1000)
-        } catch (ignored: Exception) {
-        }
-    }
-
-    fun cancel() {
-        callTimer?.cancel()
-    }
-
-    private fun getTimerUpdateTask() = object : TimerTask() {
-        override fun run() {
-            callDuration++
-            callback?.invoke(callDuration)
-        }
-    }
-}
diff --git a/app/src/main/kotlin/com/simplemobiletools/dialer/helpers/CallManager.kt b/app/src/main/kotlin/com/simplemobiletools/dialer/helpers/CallManager.kt
index 972cf4ca..728f5801 100644
--- a/app/src/main/kotlin/com/simplemobiletools/dialer/helpers/CallManager.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/dialer/helpers/CallManager.kt
@@ -104,5 +104,13 @@ class CallManager {
                 }
             }
         }
+
+        fun getCallDuration(): Int {
+            return if (call != null) {
+                ((System.currentTimeMillis() - call!!.details.connectTimeMillis) / 1000).toInt()
+            } else {
+                0
+            }
+        }
     }
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/dialer/services/CallService.kt b/app/src/main/kotlin/com/simplemobiletools/dialer/services/CallService.kt
index 922b62b3..6c030dc0 100644
--- a/app/src/main/kotlin/com/simplemobiletools/dialer/services/CallService.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/dialer/services/CallService.kt
@@ -2,14 +2,12 @@ package com.simplemobiletools.dialer.services
 
 import android.telecom.Call
 import android.telecom.InCallService
-import com.simplemobiletools.dialer.App
 import com.simplemobiletools.dialer.activities.CallActivity
 import com.simplemobiletools.dialer.helpers.CallManager
 import com.simplemobiletools.dialer.helpers.CallNotificationManager
 
 class CallService : InCallService() {
     private val callNotificationManager by lazy { CallNotificationManager(this) }
-    private val callDurationHelper by lazy { (application as App).callDurationHelper }
 
     private val callListener = object : Call.Callback() {
         override fun onStateChanged(call: Call, state: Int) {
@@ -17,12 +15,6 @@ class CallService : InCallService() {
             if (state != Call.STATE_DISCONNECTED) {
                 callNotificationManager.setupNotification()
             }
-
-            if (state == Call.STATE_ACTIVE) {
-                callDurationHelper.start()
-            } else if (state == Call.STATE_DISCONNECTED || state == Call.STATE_DISCONNECTING) {
-                callDurationHelper.cancel()
-            }
         }
     }
 
@@ -46,6 +38,5 @@ class CallService : InCallService() {
         super.onDestroy()
         CallManager.unregisterCallback(callListener)
         callNotificationManager.cancelNotification()
-        callDurationHelper.cancel()
     }
 }