When the timer stops, audio playback is gradually lowered then paused.
1. Add the Tile in the Quick Settings panel.
2. Tap the Tile to start a timer.
3. Extend, reduce or cancel the timer with the notification actions.
Note: Don’t look for a launcher icon, this app only provides a Quick Settings Tile.
Open Source project hosted on GitHub: https://github.com/SimonMarquis/SleepTimer