oxygencobalt/auxio

Auxio is a local music player for Android that focuses on doing the basic job well rather than accumulating features. It plays audio files stored on your device without requiring an internet connection, a subscription, or an account. The project is free and open-source, available through F-Droid and Accrescent for users who prefer app stores outside of Google Play. The app is built on top of modern Android media libraries, which the developer says gives it better support for a wide range of audio formats and metadata compared to apps using older Android playback APIs. It handles details like gapless playback between tracks, ReplayGain volume normalization for consistent listening levels across albums, and reading embedded cover art from your audio files. On the metadata side, Auxio supports disc numbers, multiple artists per track, release type information, and sort tags, handling more of the edge cases that simpler players ignore. There is also a folder management system that accounts for music stored on SD cards, playlist support, playback state persistence (so it remembers where you were when you reopen the app), and Android Auto support for use in a car. The design is intentionally opinionated. The developer describes the goal as prioritizing ease of use over supporting every possible edge case, and the contribution guidelines note that feature additions and large UI changes are less likely to be accepted than bug fixes. The app is private by default: no tracking, no cloud sync, no ads. Auxio is licensed under the GNU GPL v3. Building from source requires a Unix-based system because the custom media library it depends on uses shell scripts during compilation.