Guitar Chord
STANDARD: https://play.google.com/store/apps/details?id=kr.roundrect.guitar.chord.r2 LITE : https://play.google.com/store/apps/details?id=kr.pe.elex.guitar.chord 기타 코드 + 스케일 + 게임 + 튜너 + 메트로놈
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Ukulele Chord
STANDARD : https://play.google.com/store/apps/details?id=kr.roundrect.ukulele.chord.r3 LITE : https://play.google.com/store/apps/details?id=kr.pe.elex.ukulele.chord 우쿨렐레 코드 + 스케일 + 게임 + 튜너 + 메트로놈