Been taking lessons for 8 months, learning basic shapes and playing songs. But in literally 5 mins of playing with this app, chord theory that had escaped me during those 8 months suddenly dawned on me. A MUST for beginners learning to play. When your teacher shows you a shape and rattles the name so quickly you cant remember it when you get home, type the shape into this app and you immediately see what youre playing. Aha!!