Very simple, requires no permissions. It ramps down the volume and sends a Stop command. You can abort the timer by setting it to 0 minutes. The only thing it lacks is a status indicator to show when a timer is currently active.
Rocking I like google play music app but that lack sleep timer. This app fixed my isssue. Thanks to developer
Here I am Yes thank you
New in v1.1
Fix Poweramp wake up issues
Minor UI enhancements
When you enjoy the previous relaxation time in music and video night, it is a sleep timer app that automatically mute when the specified time has elapsed.