ギターのスケールとコードを覚えるアプリ(左利き可)

ギターのスケールとコードを覚えるアプリ(左利き可) is an entertainment app by lotorich with 100+ downloads (about 285 estimated). Install growth, rank history, SDKs and ad networks.

From the store listing: “Hold your smartphone like a guitar neck and practice holding down chords. A real phone would be better, but you can't carry it around all the time, and until you can play, you have to master it secretly without making any sound.”