diff --git a/app/src/main/kotlin/com/simplemobiletools/clock/activities/ReminderActivity.kt b/app/src/main/kotlin/com/simplemobiletools/clock/activities/ReminderActivity.kt
index c3a8d324..f80351fa 100644
--- a/app/src/main/kotlin/com/simplemobiletools/clock/activities/ReminderActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/clock/activities/ReminderActivity.kt
@@ -7,10 +7,7 @@ import android.content.Intent
 import android.media.AudioManager
 import android.media.MediaPlayer
 import android.net.Uri
-import android.os.Bundle
-import android.os.Handler
-import android.os.VibrationEffect
-import android.os.Vibrator
+import android.os.*
 import android.view.MotionEvent
 import android.view.ViewGroup
 import android.view.WindowManager
@@ -29,11 +26,11 @@ import kotlinx.android.synthetic.main.activity_reminder.*
 
 class ReminderActivity : SimpleActivity() {
     private val INCREASE_VOLUME_DELAY = 300L
-    private val MAX_VOL = 10f // max volume set to level 10
 
     private val increaseVolumeHandler = Handler()
     private val maxReminderDurationHandler = Handler()
     private val swipeGuideFadeHandler = Handler()
+    private val vibrationHandler = Handler(Looper.getMainLooper())
     private var isAlarmReminder = false
     private var didVibrate = false
     private var wasAlarmSnoozed = false
@@ -171,16 +168,18 @@ class ReminderActivity : SimpleActivity() {
 
     private fun setupEffects() {
         audioManager = getSystemService(Context.AUDIO_SERVICE) as AudioManager
-
+        val maxVol = audioManager?.getStreamMaxVolume(AudioManager.STREAM_ALARM)?.toFloat() ?: 10f
         if (!isAlarmReminder || !config.increaseVolumeGradually) {
-            lastVolumeValue = MAX_VOL
+            lastVolumeValue = maxVol
         }
 
-        val doVibrate = if (alarm != null) alarm!!.vibrate else config.timerVibrate
+        val doVibrate = alarm?.vibrate ?: config.timerVibrate
         if (doVibrate && isOreoPlus()) {
             val pattern = LongArray(2) { 500 }
-            vibrator = getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
-            vibrator?.vibrate(VibrationEffect.createWaveform(pattern, 0))
+            vibrationHandler.postDelayed({
+                vibrator = getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
+                vibrator?.vibrate(VibrationEffect.createWaveform(pattern, 0))
+            }, 500)
         }
 
         val soundUri = if (alarm != null) {
@@ -201,7 +200,7 @@ class ReminderActivity : SimpleActivity() {
                 }
 
                 if (config.increaseVolumeGradually) {
-                    scheduleVolumeIncrease(MAX_VOL)
+                    scheduleVolumeIncrease(maxVol)
                 }
             } catch (e: Exception) {
             }
@@ -226,6 +225,7 @@ class ReminderActivity : SimpleActivity() {
         increaseVolumeHandler.removeCallbacksAndMessages(null)
         maxReminderDurationHandler.removeCallbacksAndMessages(null)
         swipeGuideFadeHandler.removeCallbacksAndMessages(null)
+        vibrationHandler.removeCallbacksAndMessages(null)
         destroyEffects()
     }
 
diff --git a/app/src/main/kotlin/com/simplemobiletools/clock/extensions/Context.kt b/app/src/main/kotlin/com/simplemobiletools/clock/extensions/Context.kt
index 403cdf03..5c0ea429 100644
--- a/app/src/main/kotlin/com/simplemobiletools/clock/extensions/Context.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/clock/extensions/Context.kt
@@ -184,6 +184,15 @@ fun Context.hideNotification(id: Int) {
     manager.cancel(id)
 }
 
+fun Context.deleteNotificationChannel(channelId: String) {
+    if (isOreoPlus()) {
+        try {
+            val manager = applicationContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+            manager.deleteNotificationChannel(channelId)
+        } catch (_: Throwable) {}
+    }
+}
+
 fun Context.hideTimerNotification(timerId: Int) = hideNotification(timerId)
 
 fun Context.updateWidgets() {
@@ -373,9 +382,11 @@ fun Context.getHideTimerPendingIntent(timerId: Int): PendingIntent {
     return PendingIntent.getBroadcast(this, timerId, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
 }
 
-fun Context.getHideAlarmPendingIntent(alarm: Alarm): PendingIntent {
-    val intent = Intent(this, HideAlarmReceiver::class.java)
-    intent.putExtra(ALARM_ID, alarm.id)
+fun Context.getHideAlarmPendingIntent(alarm: Alarm, channelId: String): PendingIntent {
+    val intent = Intent(this, HideAlarmReceiver::class.java).apply {
+        putExtra(ALARM_ID, alarm.id)
+        putExtra(ALARM_NOTIFICATION_CHANNEL_ID, channelId)
+    }
     return PendingIntent.getBroadcast(this, alarm.id, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
 }
 
@@ -384,11 +395,8 @@ fun Context.getAlarmNotification(pendingIntent: PendingIntent, alarm: Alarm): No
     if (soundUri != SILENT) {
         grantReadUriPermission(soundUri)
     }
-
-    val channelId = "simple_alarm_channel_$soundUri"
-    val label = if (alarm.label.isNotEmpty()) {
-        alarm.label
-    } else {
+    val channelId = "simple_alarm_channel_${soundUri}_${alarm.vibrate}"
+    val label = alarm.label.ifEmpty {
         getString(R.string.alarm)
     }
 
@@ -412,7 +420,7 @@ fun Context.getAlarmNotification(pendingIntent: PendingIntent, alarm: Alarm): No
         }
     }
 
-    val dismissIntent = getHideAlarmPendingIntent(alarm)
+    val dismissIntent = getHideAlarmPendingIntent(alarm, channelId)
     val builder = NotificationCompat.Builder(this)
         .setContentTitle(label)
         .setContentText(getFormattedTime(getPassedSeconds(), false, false))
@@ -425,8 +433,7 @@ fun Context.getAlarmNotification(pendingIntent: PendingIntent, alarm: Alarm): No
         .addAction(R.drawable.ic_snooze_vector, getString(R.string.snooze), getSnoozePendingIntent(alarm))
         .addAction(R.drawable.ic_cross_vector, getString(R.string.dismiss), dismissIntent)
         .setDeleteIntent(dismissIntent)
-
-    builder.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
+        .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
 
     if (soundUri != SILENT) {
         builder.setSound(Uri.parse(soundUri), STREAM_ALARM)
diff --git a/app/src/main/kotlin/com/simplemobiletools/clock/receivers/HideAlarmReceiver.kt b/app/src/main/kotlin/com/simplemobiletools/clock/receivers/HideAlarmReceiver.kt
index 4cbedea7..e363f2fe 100644
--- a/app/src/main/kotlin/com/simplemobiletools/clock/receivers/HideAlarmReceiver.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/clock/receivers/HideAlarmReceiver.kt
@@ -4,14 +4,18 @@ import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import com.simplemobiletools.clock.extensions.dbHelper
+import com.simplemobiletools.clock.extensions.deleteNotificationChannel
 import com.simplemobiletools.clock.extensions.hideNotification
 import com.simplemobiletools.clock.extensions.updateWidgets
 import com.simplemobiletools.clock.helpers.ALARM_ID
+import com.simplemobiletools.clock.helpers.ALARM_NOTIFICATION_CHANNEL_ID
 import com.simplemobiletools.commons.helpers.ensureBackgroundThread
 
 class HideAlarmReceiver : BroadcastReceiver() {
     override fun onReceive(context: Context, intent: Intent) {
         val id = intent.getIntExtra(ALARM_ID, -1)
+        val channelId = intent.getStringExtra(ALARM_NOTIFICATION_CHANNEL_ID)
+        channelId?.let { context.deleteNotificationChannel(channelId) }
         context.hideNotification(id)
 
         ensureBackgroundThread {