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Music Theory by Justin Guitar

Musopia · Education · Brazil store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card Google Play version →
Revenue a month, worldwide
Too small to estimate
Not enough chart or ratings data
New ratings
+14
in 13 days, 650 in total
Rating
5.0 of 5
1 ratings in this store
Countries it ranks in
0
was 0 on Oct 18, 2026

Revenue

Estimated from the grossing charts of Oct 25, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / MONTH · WORLDWIDE
Unranked
Not in any grossing chart, and it sells nothing in the store (no in-app purchases, free download). Any revenue comes from ads or payments outside the store, which we can't see.
EST. LIFETIME DOWNLOADS
35 to 100
Estimated from ratings count
RATINGS
1
AVG RATING
5.00
PRICE
Grátis
AGE
1.0y
LAST UPDATE
17d ago
VERSION
1.0.7
SIZE
249 MB
AGE RATING
+4

Last 30 days

From our daily snapshots of every grossing chart and daily ratings counts.

DAYS IN A GROSSING CHART
10 / 30
COUNTRIES NOW
0 (was 0)
NEW RATINGS, LAST 7 DAYS
+8
EST. REVENUE A MONTH, DAILY · BOTH STORES EST
Show daily values
Sep 26, 2026not in a grossing chart
Sep 27, 2026not in a grossing chart
Sep 28, 2026$2.9K a month
Sep 29, 2026not in a grossing chart
Sep 30, 2026not in a grossing chart
Oct 1, 2026not in a grossing chart
Oct 2, 2026not in a grossing chart
Oct 3, 2026not in a grossing chart
Oct 4, 2026not in a grossing chart
Oct 5, 2026not in a grossing chart
Oct 6, 2026not in a grossing chart
Oct 7, 2026not in a grossing chart
Oct 8, 2026$2.9K a month
Oct 9, 2026not in a grossing chart
Oct 10, 2026$2.9K a month
Oct 11, 2026$4.8K a month
Oct 12, 2026$4.8K a month
Oct 13, 2026not in a grossing chart
Oct 14, 2026not in a grossing chart
Oct 15, 2026not in a grossing chart
Oct 16, 2026$3.3K a month
Oct 17, 2026$3.3K a month
Oct 18, 2026not in a grossing chart
Oct 19, 2026$3.3K a month
Oct 20, 2026$3.3K a month
Oct 21, 2026not in a grossing chart
Oct 22, 2026not in a grossing chart
Oct 23, 2026$3.3K a month
Oct 24, 2026not in a grossing chart
Oct 25, 2026not in a grossing chart
The same estimate as the headline, saved every day. Best rank Sep 26, 2026: not ranked. Now: not ranked.
RATINGS IN THE CORE COUNTRIES, DAILY
Show daily values
Oct 12, 2026636 ratings
Oct 13, 2026637 ratings
Oct 14, 2026635 ratings
Oct 15, 2026638 ratings
Oct 16, 2026638 ratings
Oct 17, 2026641 ratings
Oct 18, 2026642 ratings
Oct 19, 2026644 ratings
Oct 20, 2026646 ratings
Oct 21, 2026646 ratings
Oct 22, 2026647 ratings
Oct 23, 2026647 ratings
Oct 24, 2026648 ratings
Oct 25, 2026650 ratings
636 on Oct 12, 2026, 650 on Oct 25, 2026. New ratings track new downloads, even outside the charts.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
No in-app purchases
Earns from its upfront price, ads or payments outside the store.
REVIEW MOMENTUM
0.4 reviews / week
  • Trendfalling
  • Recent reviews average4.4 stars
  • Recent 1 and 2 star share14%
From the latest 21 written reviews, covering 367 days.
RELEASE CADENCE
8 updates in 90 days
  • Typical gap between releases7 days
From the last 25 versions listed on the App Store.
RATING BREAKDOWN
1 ratings
5★100%
4★0%
3★0%
2★0%
1★0%

What users want

From the latest 21 reviews on the Brazil App Store, Oct 22, 2025 to Sep 9, 2026: 14% are 1 or 2 stars. Open a theme to read what people wrote.

WHAT THEY COMPLAIN ABOUT · SHARE OF BAD REVIEWS

Only 3 of the latest 21 reviews are 1 or 2 stars, too few to find patterns. Users are mostly happy.

WHAT THEY ASK FOR
  • Thank you Justin and I wish you the best and good health brother! 5★, Dec 12, 2025
WORDS THAT KEEP COMING UP IN BAD REVIEWS

Nothing stands out.

WHAT THEY LOVE · SHARE OF GOOD REVIEWS
Easy to use18%

3 of the 4 and 5 star reviews.

★★★★★ I could only read tabs before lol and was honestly terrified of music theory and memorizing all the different chords but this made it super easy and simple to understand.
★★★★★ This app makes it so easy to stay motivated because it's small baby steps and interactive.
★★★★★ Easy to follow lessons with short quizzes to help reinforce concepts w practice tutorials.

Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.

What users say

Latest reviews, Brazil App Store.

★★★★★Sep 9, 2026
Amazing!

Im a self taught electric guitarist. I finally made myself find a real way to learn thats not just YouTube or by ear. I could only read tabs before lol and was honestly terrified of music theory and memorizing all the different chords but this made it super easy and simple to understand. Totally suggest this app. PUNKS NOT DEAD! GOD BLESS AMERICA

★★★★★Sep 1, 2026
Best of the Best

I study Justin’s material every day

★★★★★Aug 29, 2026
Trash

The first lessons did not include playing at all, so one star

★★★★★Jul 14, 2026
Really helped!

I’m taking Justin’s other class and decided that if I was really going to learn to play well, I needed to put in the hard work of understanding some music theory. I’m so glad I did. The course allowed me learn a bunch of concepts that I’ve either heard about and didn’t understand OR that I’ve never heard about before. The concepts take some work to really sink in and I can see myself coming back from time to time to refresh it in my head. Justin explains the ideas well - I just need to using them and applying them to my playing. Really happy I took this and stuck with it.

★★★★★Apr 30, 2026
Helpful!

I am using the other Justin Guitar app for about 5 months and am making good progress. I know something about music but want to know more so I can play better.

★★★★★Apr 19, 2026
Excellent resource

Justin’s music theory app is neatly organized into bite sized, easily digested sections with interactive quizzes that cement the precious learning ideas. After trying in vain to learn music theory I’ll never ever going back. Ever forward, Stephen.

Store screenshots

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App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

No App Store ads in the EU
None in the last 90 days.

Apple only publishes ads shown in the EU (EU Digital Services Act), with a 7 day delay. An app that advertises only outside the EU shows nothing here.

Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title.

music10theory9music theory8musopia net5guitar4understand4fretboard4love4theory guitar3finally understand3understand music3learning sticks3music love3justin3playing3finally3guitarists3learning3through3instantly3unlock3feedback3musopia3net3

What's new in 1.0.7

- Fixed lesson and practice cards showing outdated stars, completion status, and high scores when returning to a page. - Fixed lesson-based practice exercises, including Drag & Quiz and Drawing, failing to show their earned stars and completion status. - Fixed stars remaining hidden after previously locked content becomes available. - Fixed home-screen module progress failing to refresh immediately after completing a lesson. - Fixed module completion calculations counting shared lessons and exercises more than once. - Fixed total star counts double-counting progress saved for the same item as both a lesson and an exercise. - Fixed EDA shape quizzes displaying missing fretboard notes or using the wrong fretboard layout.

Released Oct 7, 2025. Current version shipped Oct 7, 2026.

Store description

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

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