My Name is Arthur and i recentaly released a powerfull sleep timer.
Sleep Timer (Music&Screen Off) is a sleep timer for your screen in general, and music in particular.
The app lets you set a timer and when the timer expires, it will sleep the device and turn off any music that is playing.
Putting the device to sleep means that perhaps you fell asleep using an app that keeps your device awake but if a timer is enabled, it will sleep your device and save precious battery.
It works just like a Sleep Timer on TV
Sleep Timer softly lowers the volume and then turns your music off. If you have watched a stream Sleep Timer can also turn your screen off.
Simple design and easy to use
Select how long you want the music or stream to play, press Start and Sleep Timer will appear in the notificationbar.
You can extend the length or cancel the timer directly from the notification message.
Google Play Link
I hope you like it!