Music Repertoire Manager

Here’s an idea I had for a music repertoire manager. Being a jazz player takes a lot of work. For any of hundreds of standard tunes you might be expected to know how to play the melody, the chord changes, and solo over the whole form. Once you get that far, a singer with a different vocal range might call a tune you know in any of 12 keys. I thought an app like this might help a jazz player keep track of all of that to make the best use of their practice time.