Cassette

Cassette is a Kotlin music client for Android, built for people who run their own music server. It speaks the Subsonic and OpenSubsonic API, so it works with Navidrome and other compliant servers.

It is a streaming client for your library: no accounts, no subscriptions, no tracking. Your music stays between your device and your server.

Licensed under MPL-2.0.

Features Listening

Native Android app with a shared Compose Multiplatform UI foundation, making it easy to test on desktop and potentially share business logic across platforms Streaming playback backed by AndroidX Media3 / ExoPlayer on Android Playback notification and platform media session integration Shuffle, repeat, seeking, next / previous controls, and queue management Persistent playback queue and playback session storage Star / unstar tracks from the player Library

Browse albums, playlists, recently added albums, and starred items Album, artist, and playlist detail screens Local cache for albums, artists, tracks, playlists, cover art, starred items, and playback data Pull-to-refresh on library screens that sync from your server Artists, tracks, and downloads are present in navigation and are being built incrementally Server & privacy

Subsonic and OpenSubsonic API support Navidrome is the primary target server Custom HTTP headers for servers behind a reverse proxy such as Cloudflare Access or Authelia Credentials are stored locally with platform encryption helpers No analytics and no third-party account requirement