TradMusician

https://play.google.com/store/apps/details?id=nodeslight.tradmusician2

TradMusician is an Android App for musicians using ABC notation files.
Get all your music at your fingertips during your jam sessions even without network.

- easily browse and index all the tunes in your ABC file music collection
- see each tune in standard notation and play it
- search among online tune seach engines and store the tunes in your library for offline use
- mark favorites tunes
- edit or annotate your files

You can also easily sets an "online" Tunebook (especially useful if you are a "The Session" user) and sync to it in a click after you ‘ve made change to it on the web.