# Music Theory - Chords in Keys

> Music theory app for identifying chords and arpeggios in scales and keys. (iPhone/iPad app by Stuart Bahn.)

- Source: https://appshunter.io/ios/app/music-theory-chords-in-keys/id849923063 (this page in markdown: same URL + `.md`)
- Developer: [Stuart Bahn](https://appshunter.io/developer/849923066)
- Category: Education, Music
- Price: $3.99
- Rating: 3.60/5 from 5 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.1 · 4 MB
- Languages: English
- Released: 2014-04-05
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/music-theory-chords-in-keys/id849923063/reviews.md

## What is Music Theory?

A music theory app for all musicians that trains users to identify which chords and arpeggios lie within each of the four most common scales, in all 15 major and minor keys. Audio and detailed help pages are included.

Music Theory - Chords in Keys is a music theory app that will train you to think your way around musical keys quickly and efficiently, as well as improve your aural skills. Many musicians learn basic music theory but lack the fluency and speed of thought required to maximise its usefulness. With regular use of Music Theory - Chords in Keys you will know what each of the diatonic triad and seventh chords are within all 15 of major, natural minor, harmonic minor and melodic minor scales - an extremely useful skill for any musician.
 
After installing Music Theory - Chords in Keys, choose the scale that you would like to work on (major, natural minor, harmonic minor, melodic minor) and the chord types (triads or sevenths). The app will then display a key and a Roman numeral indicating a degree of the scale. You then have to work out what chord is built off that degree of your chosen scale. Click 'Show chord' to reveal the answer. You can also reveal the notes in the scale and the notes in the chord in question, either to help you to work out the answer or as an additional tests of your knowledge of chord and scale structure.

The key to success with music theory is repetition. You should use this app every day to build up an intimate familiarity with each of the chords and arpeggios within each of the given scales. Learning these essential diatonic frameworks will make learning, performing and composing music easier, more efficient and more meaningful.

AUDIO
As well as improving your knowledge of music theory, Music Theory - Chords in Keys goes beyond most music theory apps as it features audio. Click 'Play chord' and you will hear the tonic chord for the current scale, then the chord in question, then the tonic again. This helps you develop your aural skills alongside your technical understanding of chords and scales. Eventually you will know what each diatonic triad and seventh chord sounds like in the context of its parent scale.

A summary of the relevant music theory of chord-scale relationships is included in the help pages for each scale and chord type. With regular use of this music theory app, you will know what all the fundamental three and four note chords are in each of the four scales, in all 15 major and minor keys, and you will be a better musician because of it.
 
- No ads
- Low cost
- No gimmicks
- Includes audio
- Simple clear layout
- No music-reading skills required!
 
This music theory app is ideal for guitarists, pianist, brass players, wind players, strings players, singers and just about anyone that would like to improve their knowledge of music theory, chords, arpeggios, scales and keys; whether you play rock, pop, jazz or classical music. 

Music Theory - Chords in Keys is a music theory app designed by guitarist and music educator Stuart Bahn to help music students improve their musical knowledge even whilst away from their instruments.

Download Music Theory - Chords in Keys now make your move towards music theory mastery.

If you like this music theory app, please leave a review in the App Store.

## Key features

- Identify chords and arpeggios
- Supports 15 major and minor keys
- Includes audio playback
- Detailed help pages
- Trains aural skills
- No music-reading skills required

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/music-theory-chords-in-keys/id849923063/reviews.md

### 5/5 — Exactly what I need

*2019-01-29, version 15.08.03*

Super helpful and very easy to use app-glad to have it when I don’t have my hands on the guitar. More useful than scrolling through Facebook for sure!

### 5/5 — Just What I Was Looking For

*2017-08-09, version 15.08.03*

Good app.  Just what I was looking for to learn chord values and memorize arpeggios.  Sure it would be nice if it quizzed you so you could better track your progress but I am happy with it for the price.

### 4/5 — Good Review

*2017-07-16, version 15.08.03*

This AP is a very good review of music theory. It does exactly as advertised.  If you want an inter active quiz game, go somewhere else.  This is totally an excellent tool for learning and testing yourself about these topics.

## Frequently asked questions about Music Theory

### What scales and keys does Music Theory - Chords in Keys cover?

Music Theory - Chords in Keys covers four common scales: major, natural minor, harmonic minor, and melodic minor. It supports all 15 major and minor keys, allowing users to practice identifying chords and arpeggios within these frameworks.

### Does Music Theory - Chords in Keys have ads?

No, Music Theory - Chords in Keys is ad-free, as stated in its description. This provides an uninterrupted learning experience for users.

### What is the cost of Music Theory - Chords in Keys?

Music Theory - Chords in Keys is a low-cost application, priced at $3.99. This one-time purchase grants access to all its features.

### How does Music Theory - Chords in Keys help with aural skills?

The app includes audio playback functionality. Users can hear the tonic chord, the chord in question, and the tonic again, which helps develop their aural recognition of chords within their parent scales.

### Is Music Theory - Chords in Keys suitable for beginners?

Yes, Music Theory - Chords in Keys is designed for musicians of all levels and explicitly states that no music-reading skills are required. It aims to build fluency and speed of thought around musical keys.

### What kind of music theory concepts does Music Theory - Chords in Keys focus on?

The app focuses on training users to identify diatonic triad and seventh chords within various scales and keys. It also covers arpeggios and helps users understand chord-scale relationships.

### On what devices is Music Theory - Chords in Keys available?

While specific device compatibility isn't detailed, the app is available for mobile devices. Its age rating of 4+ suggests it's designed for a broad audience.

### How often is Music Theory - Chords in Keys updated?

The app was last updated on August 22, 2015, with version 15.08.03. This indicates a release history from April 5, 2014.

## Version history (last 1 release)

### 15.08.03 — 2015-08-22

This app has been updated by Apple to display the Apple Watch app icon.

Play audio of all test chords
Display notes in chords
Display notes in scales
Options screen to set number of sharps and flats to be tested on, and choose Arabic of Roman numerals for degree of scale
Tests now cover chords all 15 major and minor keys 
Extensive scale-specific help pages explaining essentials of music theory
Major scale, natural minor scale, harmonic minor scale and melodic minor scale harmony covered

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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 2026-06-10.*