Ampaches inability to handle like named Albums (https://github.com/ampache/ampache/issues/807) was my reason to drop it and start Roadie https://github.com/sphildreth/roadie

Ampache Providor + Just Player works on mobile for me. It's not a great solution, but it gets the job done.

Tried hacking on a mobile skin last week and gave up. Cherry music is very minimal but works on mobile.

Enable the Subsonic API[1] and use DSub[2]. Work amazingly well. Not sure if you're not on Android, although I imagine there must be a decent subsonic client for most mobile platforms.

[1] https://github.com/ampache/ampache/wiki/API#subsonic-api

[2] https://github.com/daneren2005/Subsonic

The yellow on that homepage is painful.