John Gellecum
9 apps in the AppTracker catalog.
Bass Guitar Colour Scales
John Gellecum
Guitar Flash Chords
John Gellecum
Magic Circle of Fifths
John Gellecum
Circle of Fifths Xtra
John Gellecum
Bass Guitar Colour Scales C
John Gellecum
Ear Games
John Gellecum
Circle of Fifths Xtra C
John Gellecum
The Guitar Chord Challenge
John Gellecum
Guitar Chords in Colours
John Gellecum