Koel Player 
The mobile app for Koel, which provides a complete mobile app experience and doesn't have the limitations of the mobile web version. Supports both iOS and Android.
Download
You can, of course, build the project and install the app on your own.
Contribution
Koel Player is built on Flutter and Dart. If you're new to Flutter, here are a few resources to get you started:
For more help, visit the online documentation, which offers tutorials, samples, guidance on mobile development, and a full API reference.
License
MIT.