Pythagorean Tuning Keyboard vs Early Music Companion Utilisation & Stats

Early Music Companion is a tool for historically informed performances of late Medieval and Renaissance music. Features include an active Guido's Hand, a composer database, a solmization tutor, and quick references for early notation, modes, and clef transformations. (Note: this is a non-profit app: the author does not benefit financially from app sales, and all profits are donated to active Early Music organizations.)