App version: 3.8.0 (095f60da8) (Google Play)
Problem you may be having, or feature you want:
The sleep timer is great, but I find the fade before the end of the timer too short and abrupt. About a minute before the timer is up, the volume steps down some, and then abruptly shuts off at the end
Suggested solution: Fade volume in steps down to 0 over the whole timer period. Or at least over the last 50% of the period.
Screenshots / Drawings / Technical details: