# Harmonious: Music Theory — Exhaustive chords & scales

> Comprehensive music theory app for chords, scales, and harmony exploration. (iPhone/iPad app by Jared Updike.)

- Source: https://appshunter.io/ios/app/harmonious-music-theory/id1335459208 (this page in markdown: same URL + `.md`)
- Developer: [Jared Updike](https://appshunter.io/developer/1335459207)
- Category: Music, Reference
- Price: $4.99
- Rating: 5.00/5 from 6 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.3 · 38 MB
- Languages: American English
- Released: 2018-03-03
- Data updated: 2026-08-14
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/harmonious-music-theory/id1335459208/reviews.md

## What is Harmonious?

Harmonious is the exhaustive piano and guitar chord and scale app for students, composers, songwriters, arrangers, and working musicians.

What if you could learn music theory from a mentor that had all the answers? Start with what you know and follow your curiosity, confident that you have all musical options at your disposal, since Harmonious is the most complete chord and scale map. Find extensions, substitutions and chromatic flavors that lie at the edge of the familiar and the exotic. See connections through the dual lens of chords and scales, linking harmony and melody.

Clean, clear design, bold visualizations, and simple interactions help you find what you are looking for without a lot of fiddling:

— Everything is connected! Tap to navigate and use the convenient back button or index button to jump to different areas of the app with a few taps.
— Tutorials and over one hundred glossary entries teach you music theory from the ground up, presenting a complete view of the sonic landscape. Dozens of useful animations and audio examples help drive home the concepts from musical set theory, traditional harmony, and jazz theory, giving you a broad view you likely won't find anywhere else.
— Interactive piano search helps you determine how notes combine into chords and scales just by selecting notes. Tap a chord or scale to learn how to play it and more importantly, when to play it: its parent keys, modes or scales.
— Interactive fretboard search (guitar standard tuning) helps you determine what you are playing, where to play the same or similar things, and why the chord matters harmonically.
— Audio Feature: Hear chords and scales, and hear notes as you enter them. Toggle between multiple instruments, or mute to learn in silence.
— An interactive circle of fifths reference includes all major and minor keys, showing you triads and seventh chord function with just a simple flick. Extensions (ninths, elevenths, thirteenths) are available as well, with just a tap.
— Interactive scales and mode diagrams illustrate the voice-leading relationships between unordered and ordered 7-note collections (diatonic, acoustic or melodic, harmonic major and minor), allowing navigation with just a simple tap.
— Haptic Feedback, on phone devices that support it
— Share what you learn with links to the website, so other musicians, or you yourself, can find the info later.

The exhaustive reference is built on top of the following:

— Musical set theory reference — Forte codes and prime forms are the foundation of the reference, so you know it is exhaustive
— Roman numeral functions — all chords in each key, including secondary dominants and chromatic, diatonic (major) and minor functions
— Every possible triad (three-note chord) — major and minor, augmented and diminished, suspended chords, augmented sixth chords, and more
— Every possible seventh chord (four-note chord) — diminished, half-diminished, major, minor, dominant, augmented, sixth chords, add nine, and more
— Every mode — of every pentatonic, diatonic, acoustic or melodic minor, whole-tone, diminished (octatonic), harmonic major and minor, and augmented (hexatonic) scale
— Every compatible chord for each mode — including extensions (ninths, elevenths, thirteenths; flat, sharp or natural)

The aim is for Harmonious to be a complete, authoritative, and practical reference on everything harmony-related in twelve-tone equal temperament (and nearby tunings). Harmonious combines elements of musical set theory and atonal theory and jazz theory with harmony and music theory in the extended common practice, as outlined by Professor Dmitri Tymoczko in the 2011 textbook, A Geometry of Music. (See the website for more details and bibliographic references.)

In addition to attempting to be as complete a reference as possible, Harmonious attempts to map out the richness and ambiguity inherent in harmony as precisely as possible.

## Key features

- Interactive piano and guitar chord/scale search
- Dozens of tutorials and glossary entries
- Interactive circle of fifths reference
- Audio examples and instrument toggling
- Visualizations of scale and mode relationships
- Roman numeral functions and chord analysis

## Chart rankings

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

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/harmonious-music-theory/id1335459208/reviews.md

### 5/5 — Awesome

*2019-12-02*

Really great app!! Still a little buggy, but an amazing amount of info contained and a whole different side to theory that I never knew existed. Thank you for making this available, and the incredible amount of effort put into this project!!

### 5/5 — Wow!

*2019-10-05*

This app is simply amazing. It’s beyond complete. Recommended for any musician. It’s a treasure throve.

### 5/5 — Artificial intelligence for music

*2018-12-23*

This app is an essential tool for applying artificial intelligence to the creation of music.

## Frequently asked questions about Harmonious

### What is Harmonious?

Harmonious is a music theory app that provides an exhaustive reference for piano and guitar chords and scales. It includes interactive tools, tutorials, and visualizations to help users learn and explore music theory concepts.

### What music theory concepts does Harmonious cover?

Harmonious covers a wide range of music theory, including musical set theory, Roman numeral functions, triads, seventh chords, extensions, scales, and modes. It presents information from traditional harmony and jazz theory perspectives.

### Can I hear the chords and scales in Harmonious?

Yes, Harmonious features an audio function that allows you to hear chords and scales. You can toggle between multiple instruments or mute the audio to learn in silence.

### What devices is Harmonious available on?

Harmonious is available on iPhone, iPad, and iPod devices, offering a comprehensive music theory resource across Apple's mobile ecosystem.

### How often is Harmonious updated?

The latest version of Harmonious was released on January 27, 2020. While specific update frequency isn't detailed, the app has seen updates since its initial release in March 2018.

### What is the price of Harmonious?

Harmonious is a paid application, available for $4.99. This one-time purchase grants access to all its features and content.

### Does Harmonious have ads?

No, Harmonious does not contain advertisements. As a paid application, it offers an uninterrupted learning experience without any ad interruptions.

### What is the age rating for Harmonious?

Harmonious has an age rating of 4+. This indicates that the content is generally suitable for all ages, with no mature themes or potentially objectionable material.

## Version history (last 5 releases)

### 2.1.0 — 2020-01-27

2.1.0: Exhaustive Cluster-free Scales & Modes
— Pages for all Harmonic Major, Harmonic Minor, Double Augmented Hexatonic, Pentatonic scales and their 21 modes, organized and linked together in meaningful ways, as you would expect from Harmonious
— Graphical visualization of the voice-leading relationships between the 48 transpositions of the 7-note scales (diatonic, acoustic or melodic minor, harmonic major and minor)
— Similar visualizations of the voice-leading relationships between the 28 mode types for those 7-note scales, and the same diagrams for all 336 named 7-note modes
— Tap anywhere in one of these diagrams to navigate to any related scale or mode
— New diagram of two octaves of intervals
— Bug fixed: unreadable white text on white background status bar bug (dark mode)
— Bug fixed: home screen layout fix for split screen mode in landscape
— Bug fixed: compatible chords for two modes of diminished (oct) scale should be split into correct groups
— Various fixes and improvements: eliminate some typos; add extra internal hyperlinks, clarify some things, etc.

2.0.0: Tutorials & Glossary totaling tens of thousands of words, Musical Set Theory mini-book; animations; audio examples

### 2.0.3 — 2019-11-27

2.0.3: Minor bug fixes and improvements.

2.0.0: Tutorials & Glossary totaling tens of thousands of words
- Tutorials for Using the App and Interactive Search, etc.
- Learn Musical Set Theory from the ground up, an entire mini-book
- Dozens of animations and audio examples to help the concepts sink in
- Over 100 Glossary definitions of music theory terms
- Home screen redesign, Explanations

### 2.0.0 — 2019-11-16

2.0.0: Tutorials & Glossary totaling tens of thousands of words
- Tutorials for Using the App and Interactive Search, etc.
- Learn Musical Set Theory from the ground up, an entire mini-book
- Dozens of animations and audio examples to help the concepts sink in
- Over 100 Glossary definitions of music theory terms
- Home screen redesign, Explanations

### 1.2.1 — 2019-01-23

1.2.1: Background audio fixes:
- Fixed some issues with background audio, especially when other apps are playing background audio and Harmonious becomes foreground app -- let the audio continue playing until Harmonious needs to make sound
- Fixed issue where sound was inaudible when ringer switch was set to off

1.2.0: Haptic Feedback, for phone devices that support it, on the following pages:
- Interactive Keyboard Search
- Interactive Fretboard Search
- Interactive Keys Slider

### 1.2.0 — 2018-12-28

Haptic Feedback, for phone devices that support it, on the following pages:
- Interactive Keyboard Search
- Interactive Fretboard Search
- Interactive Keys Slider

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## More apps by Jared Updike

- [WetPaint: Finger Painting](https://appshunter.io/ios/app/wetpaint-finger-painting/id1508764218)
- [BPM: Percussion Metronome](https://appshunter.io/ios/app/bpm-percussion-metronome/id1521067727)

All apps by Jared Updike: https://appshunter.io/developer/1335459207

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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 2026-08-14.*