Music Theory App

About

Learn music theory the hands-on way — read each note on a real staff, then play it on the built-in piano. Every lesson runs Learn → Play → Test → Quiz, so you understand an idea, play it, prove it, and lock it in. 23 structured lessons cover the essentials: • The keyboard and note names, sharps and flats, whole and half steps • Major and minor scales, key signatures, and the circle of fifths • Melodic and harmonic intervals • Major, minor, and dominant seventh chords, inversions, arpeggios, and I–IV–V progressions • Rhythm and note values, dotted notes, and cadences Each lesson pairs a clear explanation with audio and a guided play-along exercise on a responsive keyboard that lights up the next note (with finger numbers if you want them). Plus: • Songs — learn real melodies note by note with a follow-along score • Sight-reading practice, an interactive Circle of Fifths, a theory glossary, and a Free Play piano sandbox with live chord detection • Quizzes, progress tracking, stars, and daily streaks to keep you moving Built for complete beginners through early-intermediate players. Whether you're picking up an instrument or just want to understand how music works, this is a solid, playable foundation in the language of music.