Good start, needs more work
I think that this app has a lot of potential for solo instrumentalists to work on their sight reading, but for any harmonic work this app does not help. The harmonies are always completely random and never stick to any chords, chord progressions, scales… plus the notes don’t line up properly when using two staffs at the same time (aka grand staff). Hopefully this gets further worked on cause this would be a godsend to all pianists out there