I’ve been using substreamer to access my Navidrome server from my android phone initially but I just came to learn about Tempo, which is also a nice app. What I like about substreamer among others is the option to let it download fanart from an external source by itself bypassing navidrome. There might be more nice apps, so I’m curious what you folks are using on your mobile devices.
Dsub, because It’s very stable with just enough features and a usable UI. Ultrasonic is close, but there’s a glitch I’ll have occasionally that causes my music to play twice. Haven’t checked to see if it’s been fixed in a while. Substreamer is very pretty. Last time I checked, it was missing gapless playback. Synphonium has a weird tendency towards offline. I believe playlists wouldn’t update right. But the main reason I don’t use it is that it’s the only paid app, and I’ll occasionally not have the Google Play Store.