Symfonium

Website
Android-exclusive. Small development, one developer but the most feature-rich music player for 01 Notes/Navidrome instances. The developer found a way around the Google Apps requirement by offering a lifetime "Trial" version through direct payment on his Ko-Fi account.

Features

Symfonium allows for the most customization on any music player I've ever seen. It's not for the feint of heart, because without the customization it's fairly vanilla. Vanilla can let you just create playlists and do some "smart" playlist creation.

However, to get the most out of the customization, the music files need to have extensive metadata so the "smart" playlists can create based on similar files, ie bpm, tempo, etc. I use a hybrid super custom and vanilla--- I get by with tags, limited metadata, and self-created playlists because I don't really care about music. I mostly listen to podcasts and audiobooks.

The UI is super customizable, and offers community templates which is always appreciated because I plug-and-played a good looking one.

Symfonium also supports AutoEQ database so users can download and use ideal presets for most consumer audio devices; ie my Bose QC headphones are optimized.

The biggest feature is streaming lossless music from a self-hosted server, being able to cache songs locally, and being able to compress the stream as necessary depending on data availability. Spotify does not offer near lossless, but Symfonium allows compression from lossless down to lower bitrates as needed.