is a free android application for learning guitar scales for 7 strings guitar and memorize the notes on the guitar fretboard. It contains chromatic, Ionian (major), harmonic major, Dorian, Phrygian, Lydian, Mixolydian, Aeolian (minor), Locrian, harmonic minor, major pentatonic, minor pentatonic, blues pentatonic, Hungarian Gypsy, Ukrainian Dorian, Acoustic, Persian, Algerian, Flamenco, Hawaiian, Chinese, Byzantine and Neopolitan scales. Highlight the whole fretboard to show which notes are wi