Now it's official: #Funkwhale 0.12 is out with partial support for the Subsonic API, enabling users to access their instance library from existing clients such as DSub.
TL;DR: you can use Funkwhale from your smartphone and get the following features out of the box:
- offline cache for your playlists, favorites tracks or artists, current queue
- easy playlist management (creation, update, deletion)
- favorites management
As usual, the full changelog is here: https://docs.funkwhale.audio/changelog.html#id1