# Music Theory Keys • — Key Signatures testing

> Music theory app for recognizing key signatures and modes with a grade tracking feature. (iPhone/iPad app by Patrick Q. Kelly.)

- Source: https://appshunter.io/ios/app/music-theory-keys/id1017426995 (this page in markdown: same URL + `.md`)
- Developer: [Patrick Q. Kelly](https://appshunter.io/developer/310068987)
- Category: Music, Education
- Price: $0.99
- Rating: 3.30/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 40 MB
- Languages: American English
- Released: 2015-11-09
- Data updated: 2026-08-31
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/music-theory-keys/id1017426995/reviews.md

## What is Music Theory Keys?

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).

## Key features

- Key signature recognition (Major, Minor, Modes)
- Customizable quiz settings (sharps/flats, key groups)
- Multiple clef support (Treble, Alto, Tenor, Bass)
- Adjustable question count
- Printable/shareable Grade Book
- Filterable grade results

## Chart rankings

- #193 in Top Paid · Music (US App Store)

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/music-theory-keys/id1017426995/reviews.md

### 1/5 — Way over beginners heads.

*2025-01-10*

This app is forj music theory, studj notj app for beginners.
I opened it to see if I could learn learn how to read keys and I lost interest in music almost immediately.

### 3/5 — Not to learn new things

*2019-01-22*

This app does a pretty decent job on reviewing what you already know, however, if you’re hoping to learn anything from it this is not the app(s) for you. It doesn’t have lessons or teach you anything about why you were wrong. It’s simply you’re right/wrong, next question. 
The only other issue I have is with the notes specifically, you have to press piano keys instead of just being able to tap on a letter/accidental. For those who do not yet know how to translate sheet music to piano specifically that may be a little extra challenging.

## Frequently asked questions about Music Theory Keys

### What key signatures can Music Theory Keys • recognize?

Music Theory Keys • can recognize Major, Minor, and the seven Diatonic Modes. You can customize whether to include major and minor keys, the modes, or both groups in your tests.

### What clefs does Music Theory Keys • support?

The app supports Treble, Alto, Tenor, and Bass clefs, making it versatile for musicians who read music in different clefs.

### How does the Grade Book feature work in Music Theory Keys •?

The Grade Book saves all your quiz results, including the name, date, time, settings used, and your score as a percentage and letter grade. You can filter these grades by name and print or send them.

### Can I customize the difficulty of the quizzes in Music Theory Keys •?

Yes, you can set the maximum number of sharps or flats available for recognition. You can also set the number of questions for each quiz or stop at any time to grade the answered questions.

### What is the price of Music Theory Keys •?

Music Theory Keys • is a paid app, available for $0.99. There are no in-app purchases or advertisements mentioned.

### Does Music Theory Keys • have ads?

No, Music Theory Keys • does not contain advertisements. It is a paid application that offers an ad-free experience.

### What devices is Music Theory Keys • available on?

Based on the provided data, Music Theory Keys • is supported on iPhone. It is not specified if it is available on iPad or other Apple devices.

### How often is Music Theory Keys • updated?

The app was last updated to version 5.0 on January 8, 2026. While specific update frequency isn't detailed, this indicates ongoing development.

## Version history (last 5 releases)

### 5.0 — 2026-01-08

Updated for compatibility and functionality.

### 3.0 — 2023-03-14

Major update for compatibility and functionality.

### 2.0 — 2019-01-03

Major update for compatibility and functionality.

### 1.1 — 2015-11-30

Bug fixes and other improvements.

### 1.0 — 2015-11-09

No release notes.

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## More apps by Patrick Q. Kelly

- [Maestro](https://appshunter.io/ios/app/maestro/id310068984)
- [Maestro Lite](https://appshunter.io/ios/app/maestro-lite/id313724078)
- [Bored](https://appshunter.io/ios/app/bored/id324715902)
- [SMPTE Score](https://appshunter.io/ios/app/smpte-score/id343770624)
- [Lock Master](https://appshunter.io/ios/app/lock-master/id348792868)
- [Fingering](https://appshunter.io/ios/app/fingering/id353809211)

All apps by Patrick Q. Kelly: https://appshunter.io/developer/310068987

## Related topics

[key signatures](https://appshunter.io/ios/topics/key-signatures)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*