Quick Theory
All-in-One Course & Toolkit
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
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.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://theary-site.vercel.app/privacy
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The developer, HANOCH YOSEF LIB, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- HANOCH YOSEF LIB
- Size
- 77.8 MB
- Category
- Education
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime $59.99
- Yearly $29.99
- Monthly $4.99
- Copyright
- © 2026 Hanoch Lib