# Ultrasonic
[](https://circleci.com/gh/ultrasonic)
[]()
[](https://ktlint.github.io/)
Ultrasonic is free and open-source music streaming Android client for [Subsonic](http://www.subsonic.org/) [API](http://www.subsonic.org/pages/api.jsp) (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.
## 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://github.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.
## Bugs and issues
First, see if your issue haven’t been yet reported [here](https://github.com/ultrasonic/ultrasonic/issues),
otherwise open [a new issue](https://github.com/ultrasonic/ultrasonic/issues/new).
### Known (not our) bugs
If you are using *Madsonic 5.1.X* several sections of Ultrasonic will not
work. This is caused by bad implementation of Subsonic API by Madsonic. For
more info about this you can read [this bug](https://github.com/ultrasonic/ultrasonic/issues/129).
## Contributing
See [CONTRIBUTING](CONTRIBUTING.md).
## Supported (tested) Subsonic API implementations
- [Subsonic](http://www.subsonic.org/pages/index.jsp)
- [Airsonic](https://github.com/airsonic/airsonic)
- [Supysonic](https://github.com/spl0k/supysonic)
- [Ampache](https://ampache.org/)
Other *Subsonic API* implementations should work as well as long as they follow API
[documentation](http://www.subsonic.org/pages/api.jsp).
## 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](https://opensource.org/licenses/gpl-3.0.html).