How to fix: The Tasbih vibrations do not work

If your iPhone is on "Silent Mode" and the Tasbih is on "Ringer Mode" your iPhone will not vibrate unless you activate "Vibrate on Ring" and "Vibrate on Silent" in your iPhone settings.

To access the vibrate settings in iOS, please go to Settings > Sounds & Haptics > Toggle on Vibrate.

To access the vibrate settings in your Android, please go to Settings > Sounds and Vibration  > Increase the vibration intensity.