"Simple Vibration Alarm" is an alarm application dedicated to vibration. It's no sound. Please use it as an alarm when you are in trouble with sounds such as in trains and libraries! *For customers using Android 10 who experience problems such as the alarm not sounding* We apologize to you for the inconvenience. The problem can be resolved by Uninstalling the app → Restarting the device → Reinstalling the app If you have tried the steps above several times and this problem is not resolved, ple