Piano Companion PRO: chords / Piano Chords, Scales, Progression Companion PRO - Play the piano but I can't cope with the study of chords or analysis of what ringtones, then this app was created especially for you. With it, you can not only learn to identify chords, scales and notes but also to create real music. By combining all this in a group you will be able to receive the result later you can start it and listen to what you have left.