Quick Theory

Three narrated courses — theory and ear training — plus a tuner, metronome, jam-along recorder, slow downer, and more. Try everything free for a week.

Quick Theory teaches real music theory the way a friendly teacher would: one small idea at a time, with your hands on the answers — then hands you the practice tools to use it.

THREE FULL COURSES, EVERY LESSON NARRATED • Introduction to Music Theory — from the twelve notes to real chord progressions: steps, the major scale, key signatures, the circle of fifths, intervals, triads, and the chords every key contains. • Introduction to Music Theory, Part Two — minor keys for real, pentatonic and blues colors, and chords with depth: symbols, inversions, and sevenths. • Ear Training, Part One — learn to hear a melody's shape, find "home," and name every scale degree by ear. No jargon to start — just you and the sound. Every lesson has a Listen mode: a narrated, animated walkthrough you can learn from with your eyes closed.

TYPE THE MUSIC No instrument needed — you answer with a letter keyboard (A to G, sharps and flats) and quick taps. The piano on screen is your teacher's piano: it plays and shows, you listen and spell. A Sharp and B Flat share a key but mean different things — Quick Theory is the rare app that teaches you why, at exactly the moment it matters.

MISTAKES ARE PART OF THE PLAN Wrong answers get real explanations — not just "incorrect." Miss the same idea twice and the app changes how it asks. Speed Rounds and Review Mixes keep old skills warm, and a lenient streak celebrates showing up and forgives a missed day.

A PRACTICE ROOM IN YOUR POCKET • Tuner that locks onto your string • Metronome with real drum sounds, subdivisions, and accents • Jam Along — play over a backing band and record your takes • Slow Downer — slow down any song you import without changing its pitch • Riff Recorder for capturing ideas before they escape • Lyric Studio with a home-screen widget • Playable piano, circle of fifths, guitar scale fingerings, melody helper, song notebook, and music calculators

YOURS, PRIVATELY No account, no ads, no tracking. Works fully offline; your progress, songs, lyrics, and recordings sync privately through your own iCloud so they follow you across your devices — nobody else can see them, including us.

ONE MEMBERSHIP, EVERYTHING INCLUDED Quick Theory Plus unlocks every course and every tool, starting with a 1-week free trial. Subscribe for $4.99/month or $29.99/year, or buy once for $59.99 and keep it forever. Subscriptions renew automatically until canceled at least 24 hours before the period ends; manage or cancel anytime in your Apple Account settings.

Whether you sing, play, produce, or just want to finally understand what "the key of F major" means, Quick Theory gets you there a few minutes at a time.

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