# Ultrasonic
Ultrasonic is free and open-source music streaming Android client for
[Subsonic][subsonic] [API][subapi] (version 1.7.0 or higher) compatible
servers.
## Help wanted
We currently don't have that much time to spend developing Subsonic, so any
contributions or active developers are always welcomed.
Have a look at [CONTRIBUTING](CONTRIBUTING.md) to get started.
## Download
App is available to download at following stores:
[
](https://play.google.com/store/apps/details?id=org.moire.ultrasonic)
[
](https://f-droid.org/packages/org.moire.ultrasonic/)
[
](https://gitlab.com/ultrasonic/ultrasonic/-/releases)
**Warning**: All three versions (Google Play, F-Droid and the APKs) are not
compatible (not signed by the same key)! You must uninstall one to install
the other, which will delete all your data.
If you want to use the version downloaded from F-Droid or from GitLab with
**Android Auto**, you must enable Unknown Sources as it is described in
[this wiki page][wikiaa].
## Bugs and issues
First, see if your issue haven’t been yet reported [here][issues], otherwise
open [a new issue][newissue].
## Contributing
See [CONTRIBUTING](CONTRIBUTING.md).
## Supported (tested) Subsonic API implementations
- [Subsonic][subsonic]
- [Airsonic-Advanced][airsonic]
- [Supysonic][supysonic]
- [Ampache][ampache]
Other *Subsonic API* implementations should work as well as long as they
follow API [documentation][subapi].
## License
This software is licensed under the terms of the GNU General Public License
version 3 (GPLv3).
Full text of the license is available in the [LICENSE](LICENSE) file and
[online][gpl3].
[wikiaa]: https://gitlab.com/ultrasonic/ultrasonic/-/wikis/Using-Ultrasonic-with-Android-Auto
[issues]: https://gitlab.com/ultrasonic/ultrasonic/-/issues
[newissue]: https://gitlab.com/ultrasonic/ultrasonic/-/issues/new
[subsonic]: http://www.subsonic.org/
[subapi]: http://www.subsonic.org/pages/api.jsp
[airsonic]: https://github.com/airsonic-advanced/airsonic-advanced
[supysonic]: https://github.com/spl0k/supysonic
[ampache]: https://ampache.org/
[gpl3]: https://opensource.org/licenses/gpl-3.0.html