---
title: "Music Theory Keys • - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Teachers, students and professional musicians: Recognize Major, Minor, and Diatonic Mode key signatures. Jazz musicians will particularly benefit from the modes recognition.  Includes a 'Grade Book' l"
---

# Music Theory Keys • — United States
> Key Signatures testing

![Music Theory Keys • App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/33/8b/85/338b8504-e46b-57a6-3ea6-e7d31567020e/MusicTheoryKeys-0-0-1x_U007ephone-0-1-0-sRGB-85-220.png/434x0w.png)

**Developer:** [Patrick Kelly](https://apptail.io/developer/patrick-kelly-aAk)
**Category:** Music
**Rating:** 3.3/5 (4 ratings)
**Price:** Free
**Bundle ID:** com.patrickqkelly.musictheorykeysforiphone
**Store:** Apple App Store
**Country:** United States
**Version:** 5.0 (released 2026-01-08)
**Original Release:** 2015-11-09
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1017426995)
**AppTail Page:** [https://apptail.io/app/music-theory-keys-nMyl/united-states](https://apptail.io/app/music-theory-keys-nMyl/united-states)

## Music Theory Keys • Description
Teachers, students and professional musicians: Recognize Major, Minor, and Diatonic Mode key signatures. Jazz musicians will particularly benefit from the modes recognition. 
Includes a 'Grade Book' list of all saved results that you can print or send. 

• Set maximum numbers of sharps or flats available.
• Set major and minor keys, the seven diatonic modes, or both groups. 

• Treble, Alto, Tenor, and Bass clefs. 
• Set the number of questions, or stop anytime and grade only the number answered. 

The Grade Book is filterable by name.
Grades include the name, date and time the quiz was taken, all relevant settings (clef, number of questions, etc.), and score (percentage and letter grade).

## Music Theory Keys • Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/d6/2e/5e/d62e5ee1-b779-e179-4f22-3905896ff4f7/MTK-50-69-1.png/1320x2868.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/cb/25/cc/cb25ccf5-29ec-4acc-bfb5-1dae889adfeb/MTK-50-69-2.png/1320x2868.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/97/f7/a3/97f7a364-c9bf-fafb-dc32-1147bed0c8ec/MTK-50-69-3.png/1320x2868.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/f8/8a/93/f88a93ac-7e58-5cdd-1f10-7bd79dd94585/MTK-50-69-4.png/1320x2868.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/d8/06/d2/d806d2f3-7a5e-9edb-608d-339544be4101/MTK-50-69-5.png/1320x2868.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/47/4a/f0/474af0e6-f04c-7892-f2f0-eae9df375a0b/MTK-50-69-6.png/1320x2868.png)

## Music Theory Keys • Rating Breakdown in United States
- 5 stars: 1 (25%)
- 4 stars: 1 (25%)
- 3 stars: 1 (25%)
- 2 stars: 0 (0%)
- 1 stars: 1 (25%)




## Music Theory Keys • Discovered Keywords
- music theory keys

## Apps Similar to Music Theory Keys •
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## Music Theory Keys • Available In
- [United States](https://apptail.io/app/music-theory-keys-nMyl/united-states)
- [Japan](https://apptail.io/app/music-theory-keys-nMyl/japan)
- [United Kingdom](https://apptail.io/app/music-theory-keys-nMyl/united-kingdom)
- [New Zealand](https://apptail.io/app/music-theory-keys-nMyl/new-zealand)
- [Australia](https://apptail.io/app/music-theory-keys-nMyl/australia)
- [Azerbaijan](https://apptail.io/app/music-theory-keys-nMyl/azerbaijan)
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- [Brazil](https://apptail.io/app/music-theory-keys-nMyl/brazil)
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- [Nepal](https://apptail.io/app/music-theory-keys-nMyl/nepal)
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- [Ukraine](https://apptail.io/app/music-theory-keys-nMyl/ukraine)
- [Vietnam](https://apptail.io/app/music-theory-keys-nMyl/vietnam)
- [United Arab Emirates](https://apptail.io/app/music-theory-keys-nMyl/united-arab-emirates)
- [South Africa](https://apptail.io/app/music-theory-keys-nMyl/south-africa)
- [Armenia](https://apptail.io/app/music-theory-keys-nMyl/armenia)
- [Argentina](https://apptail.io/app/music-theory-keys-nMyl/argentina)
- [Austria](https://apptail.io/app/music-theory-keys-nMyl/austria)

---

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