Company 5 Diamond Music Services, Inc. created these great apps:
Guitar Note Workout, Bass Note Workout, Guitar Sight Reading Workout, Bass Sight Reading Workout, Guitar Note Legend, Bass Note Legend, 5 String Bass Note Legend, Pentatonic Scale Workout, Blues Scale Workout, Guitar Mode Workout, Guitar Chord Workout, Guitar 7th Chord Workout, Bass Modes, 5 String Bass Modes, Guitar Melodic Minor Workout, and others..
