---
title: "Scale Theory - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "You know the theory. You just have to look it up.  Scale Theory is a drill tool for musicians who want faster, more reliable recall — key signatures, diatonic harmony, modes, chord functions, and rela"
---

# Scale Theory — United States
> Internalize music theory.

![Scale Theory App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/19/1b/cd/191bcda3-2922-6e7b-e82e-61444e955004/AppIcon-0-0-1x_U007ephone-0-1-P3-85-220.png/434x0w.png)

**Developer:** [Gabriel Koen](https://apptail.io/developer/gabriel-koen-ctTd)
**Category:** Music
**Rating:** N/A (0 ratings)
**Price:** $1.99
**Bundle ID:** yellowdress.ScaleTheory
**Store:** Apple App Store
**Country:** United States
**Version:** 1.0 (released 2026-05-25)
**Original Release:** 2026-05-25
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6761800685)
**AppTail Page:** [https://apptail.io/app/scale-theory-bvQz/united-states](https://apptail.io/app/scale-theory-bvQz/united-states)

## Scale Theory Description
You know the theory. You just have to look it up.

Scale Theory is a drill tool for musicians who want faster, more reliable recall — key signatures, diatonic harmony, modes, chord functions, and relative minor relationships. Not slower. Not effortful. Just known.

What you'll learn:
• Key signatures: sharps, flats, and which notes they are, in both directions
• Relative minor keys, quizzed both ways
• Diatonic triads and seventh chords in every major key — names, qualities, and notes
• All seven modes: names, interval formulas, and characteristic chords
• Chord functions: identify and spell the dominant seventh and half-diminished chord in any key

How it works:
Each topic follows a review-then-quiz loop. New items are revealed one piece at a time, so you're predicting the next step before it appears. After every few new items, a recap quiz covers everything learned so far — not just what's recent. A randomized Practice mode presents questions in mixed formats across all keys, with upcoming answers hidden so you can't read ahead.

Key signatures follow circle-of-fifths order, which is how keys actually relate to each other.

Who it's for:
• Players who want to think faster when improvising or reading charts. 
• Anyone whose theory knowledge lives in their head in a slow, effortful way.
• Students prepping for graded exams. 

This is a drill tool, not a lesson. It assumes you've encountered these concepts — it's here to make them automatic.

## Scale Theory Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/6a/c4/d7/6ac4d761-f148-786e-cc9f-d8ec1d0bfc52/1-home.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ab/c4/f1/abc4f1ff-de86-0719-7095-f2071f3dc87a/2a-review.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/a0/23/b3/a023b3e0-3d5d-8d0d-40aa-1dbf3c9295e5/2b-quiz.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/38/4a/48/384a4823-c44c-0ac8-9350-cae50df3f946/3a-review.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/58/47/bf/5847bf7f-ca39-c0e7-58e5-2dd7ea167bae/3b-quiz.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/22/ee/08/22ee08b8-bb05-eb99-ff09-64380d216150/4-practicecomplete.png/1284x2778.png)







## Scale Theory Available In
- [Austria](https://apptail.io/app/scale-theory-bvQz/austria)
- [Australia](https://apptail.io/app/scale-theory-bvQz/australia)
- [Canada](https://apptail.io/app/scale-theory-bvQz/canada)
- [Colombia](https://apptail.io/app/scale-theory-bvQz/colombia)
- [Germany](https://apptail.io/app/scale-theory-bvQz/germany)
- [Dominican Republic](https://apptail.io/app/scale-theory-bvQz/dominican-republic)
- [United Kingdom](https://apptail.io/app/scale-theory-bvQz/united-kingdom)
- [Latvia](https://apptail.io/app/scale-theory-bvQz/latvia)
- [Madagascar](https://apptail.io/app/scale-theory-bvQz/madagascar)
- [United States](https://apptail.io/app/scale-theory-bvQz/united-states)
- [South Africa](https://apptail.io/app/scale-theory-bvQz/south-africa)

---

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