Jetispot

Probably usable UNOFFICIAL Spotify client for Android, built with Jetpack Compose and librespot-java
Spotify Premium account is REQUIRED*. Offline caching, DRM bypassing or raw file downloading is prohibted by ToS and will NEVER be implemented in Jetispot. Don’t waste your time trying to request these features.

What’s working:

sign in (login/pass only, no FB/Meta/whatsoever support, no Smart Lock either)
“browse”, “home”, album, premium plan, artist and genre screens (some of the blocks might be unsupported)
library: “liked songs” w/ tag&sort support, rootlist (liked playlists) + pins + artist/album support w/ nice animations, delta updates + pub/sub processing support
basic playback w/ Spotify Connect support (connect support is very WIP)
fairly optimized R8 rules, providing approx. 5-6 megabytes release APK size (with the playback and protobuf parts!)

What’s in progress:

“Now Playing” improvements
better service (notification improvements)

Application stack:

playback: librespot-java as the core + sinks/decoders from librespot-android + Media2 for the mediasession support
UI: Jetpack Compose
DI: Hilt/Dagger
network: Retrofit w/ Moshi+Protobuf converters
pictures: Coil
storage: Room (collection), MMKV (metadata)
arch: MVVM
preferences: Jetpack Datastore (proto)

Credits:

librespot-java for the core API part and playback
librespot-android for sink and decoder source (in Jetispot they are rewritten to Kotlin)
moshi and moshix for the undocumented API JSON parsing
VK Icons for the amazing icon set used in the application’s icon
MMKV for ultra-fast way to cache entity extended metadata
Google for Android/Jetpack/Hilt

I heard some people can log in with a free account, but I won’t provide any assistance to people without premium subscription. There is a possibility that a subscription check may be added to the client side in the future.