Music Theory by Justin Guitar
How Music Works
Free · In‑App Purchases · Designed for iPad
Tired of theory lessons that put you to sleep? Welcome to the app that turns music theory into a guitar superpower!
The Music Theory by JustinGuitar app utilizes Justin's proven guitar-first approach to transform complex theory into practical playing skills. Finally understand music the way that actually makes sense for guitarists.
Unlike traditional theory courses that leave you drowning in abstract concepts, this app gets you playing immediately. Every lesson combines bite-sized theory with hands-on fretboard exercises. No passive watching - this is active learning that sticks.
Why This Changes Everything:
Skip the hours of videos and textbooks. Work through interactive lessons that take you straight to the practical stuff. See a pattern, play it instantly and understand it forever. It's the most efficient way to finally "get" music theory as a guitar player. This knowledge will supercharge your motivation as you unlock new levels in your playing.
What You'll Accomplish:
• Stop feeling lost when people talk about keys, scales, notes, and chord progressions
• Learn songs by ear instead of relying on tabs
• Memorize and find any chord/note on the fretboard instantly
• Recognize the patterns hiding in every song you love
• Join jams with confidence instead of just following along
• Create your own music and write killer riffs because you understand what makes them work
• Break through that frustrating plateau you've been stuck on
• Accelerate your learning by knowing the language of music
Built Purposefully for Guitarists:
Everything happens on the fretboard where you actually play. No confusing piano diagrams or abstract notation, it’s music theory you can use immediately.
Interactive Learning That Sticks:
• Quick exercises that build on each other systematically
• Fretboard trainer that helps you memorize essential notes and chords
• Immediate feedback so you know you're getting it right
• Learn at your own pace without getting overwhelmed
• Apply new concepts instantly to the music you love
From the Teacher Millions Trust:
Justin Sandercoe has taught millions of guitarists worldwide through his legendary JustinGuitar platform. His clear, encouraging teaching style has helped everyone from absolute beginners to touring professionals unlock their potential.
Ready to finally understand the music you love? Download the app and transform from stuck to unstoppable today!
We’d love to hear your feedback - email us at music.theory.ios.feedback@musopia.net
*The lowest requirements for using the app on the i Phone are:
- iPhone 6S (2015)
- iPad (5th generation, 2017)
- iPad mini (4th generation, 2015)
- iPad Air (2nd generation, 2014)
- iPad Pro (2015)
-iOS 15 or newer
*Not optimized for PC or Mac
Important subscription information
Justin Guitar offers several FULL ACCESS subscription packages that unlock unlimited access to all the published stages.
Subscription purchases are charged to your iTunes account upon confirmation of the purchase. All subscriptions will AUTOMATICALLY be renewed unless the auto-renew is turned off at least 24 hours prior to the end of the current period. Your iTunes account will be charged a normal subscription price of the original subscription within 24 hours prior to the end of the current period.
You can manage your subscriptions and turn off auto-renew by going to your Account Settings after the purchase. Subscriptions are non-refundable and may not be cancelled during an active subscription period.
Our privacy policy can be found at https://www.musopia.net/privacy/
Terms of use: https://musopia.net/terms
New Lessons 1–4 in Unit 3
Start exploring the next chapter of your theory progression with four new lessons packed with essential concepts.
Brand-new exercises in Unit 2
Continue building your skills with fresh practice material designed to deepen your understanding.
Improved exercises in Unit 1
Early-unit exercises have been polished for clarity, smoother interaction, and a better overall learning experience.
The developer, Musopia, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Musopia Oy
- Size
- 179.2 MB
- Category
- Education
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Yearly subscription $79.99
- Monthly subscription $9.99
- Copyright
- © 2025 Musopia Oy