I really like my music setup right now:
- first I purchase music as mp3 (amazon, google play, bandcamp, etc)
- then I sync it to phone, media server, backup server and even to car radio using syncthing (screenshot 1)
- I can play it on my PC using Lollypop and control playback from my phone using KDE Connect (screenshot 2) and because it's synchronized with my phone and car I can play it offline no problem using native apps (LineageOS "Eleven" here, screenshot 3)
everything #foss and DRM-free!
I made a #foss Burger King web app which can run on any phone and device and is usable in the Czech Republic, Germany, Netherlands, Austria, Switzerland, Finland, Sweden and Bulgaria
So if you are looking for some fast food apps for your #linux phone, most basic functionality is there and it looks exactly like the Android one!