# Music Theory Keys — Quiz Tonality by Key Signature

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

- Source: https://appshunter.io/ios/app/music-theory-keys/id511629431 (this page in markdown: same URL + `.md`)
- Developer: [Patrick Q. Kelly](https://appshunter.io/developer/310068987)
- Category: Music, Education
- Price: $0.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 26.0 · 41 MB
- Languages: American English
- Released: 2012-04-06
- Data updated: 2026-06-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/music-theory-keys/id511629431/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 share. 

• 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

- Recognize key signatures
- Identify diatonic modes
- Supports multiple clefs
- Customizable quiz settings
- Grade book with printable results
- Filterable by name


## Frequently asked questions about Music Theory Keys

### What is Music Theory Keys?

Music Theory Keys is a paid app designed to help users recognize major, minor, and diatonic mode key signatures. It supports various clefs and offers customizable quizzes with a grade book feature.

### Who is Music Theory Keys for?

This app is beneficial for music teachers, students, and professional musicians who want to enhance their skills in identifying key signatures and musical modes.

### What clefs does Music Theory Keys support?

Music Theory Keys supports Treble, Alto, Tenor, and Bass clefs, making it versatile for different instrumentalists and vocalists.

### Can I customize the quizzes in Music Theory Keys?

Yes, you can set the maximum number of sharps or flats, choose to quiz on major and minor keys, diatonic modes, or both. You can also set the number of questions or grade based on answered questions.

### Does Music Theory Keys have ads?

No, Music Theory Keys does not contain advertisements. It is a paid application with no ads to disrupt the learning experience.

### What information is included in the Grade Book?

The Grade Book saves results including the name, date, time, quiz settings (clef, number of questions), and score (percentage and letter grade). It is also filterable by name and can be printed or shared.

### On what devices can I use Music Theory Keys?

Music Theory Keys is currently supported on iPads. It is designed to leverage the larger screen size for an optimal user experience.

### How often is Music Theory Keys updated?

The latest version of Music Theory Keys is 5.0, last updated on January 7, 2026. This indicates a commitment to ongoing development and improvements.

## Version history (last 5 releases)

### 5.0 — 2026-01-07

Updated for compatibility and functionality.

### 4.0 — 2022-04-14

Major update for compatibility and functionality.

### 3.5 — 2019-01-12

Major update for compatibility and functionality.

### 3.0 — 2015-12-05

Updated for iPad Pro. Small bug fixes and other improvements.

### 2.0 — 2014-07-03

Added landscape orientation, updated interface.
Major upgrade to stability and efficiency.

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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

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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 2026-06-24.*