Tool for comparing scales and chords.It helps when composing.Can be used to learn music theory.Features:- Without advertising- Compare scales and chords.- Display scales and chords on a keyboard / piano.- Display scales and chords on a guitar.- Preview (sound) scales and chrods.- Free playing mode (sound mode).- Save, open, export and share annotations.- Convert piano scales and chords on guitar.- Convert guitar scales and chords on piano.- Alternate guitar tunings.- Tunings for ukelele, violin, viola and banjo.- Community (BETA): Share your files and download from other users.- Left-handed guitar option.- Support multiple screens.