# Mehegan Jazz Harmony

> Jazz harmony notation and transposition tool with iReal Pro integration. (iPhone/iPad app by Norman Schmidt.)

- Source: https://appshunter.io/ios/app/mehegan-jazz-harmony/id931192025 (this page in markdown: same URL + `.md`)
- Developer: [Norman Schmidt](https://appshunter.io/developer/428238046)
- Category: Music, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 7.0 · 13 MB
- Languages: American English
- Released: 2014-11-03
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/mehegan-jazz-harmony/id931192025/reviews.md

## What is Mehegan Jazz Harmony?

John Mehegan (1916-1984) was a jazz pianist, critic, educator and author of many books on jazz. He came up with this unique style of roman numeral notation that represents a harmonic approach to jazz facilitating transposition in all keys.

This app demonstrates how the Mehegan system works by showing regular chord notation with equivalent roman numerals side by side. Real-time modification of chords can be done in all keys.

A second page allows viewing roman numeral chord charts from the iReal Pro app (a paid app that must be installed separately). In order to import into Mehegan you need to go the iReal Pro and share a chart using the "Open in..." option or by pasting it to the clipboard.

When using the Mehegan App with iReal Pro certain text entries are used for key changes. In the iReal Pro app, these have to be typed in at the beginning of the staff text entry for any chord where a key change takes place. For example, "/1/" tells the chord progression to move up a full step, "\3\" down a major third, etc. For more information on this as well as numerous examples, including Rousseau notation, check out the examples on the supporting web page and John Mehegan's books.

## Key features

- Roman numeral jazz harmony notation
- Real-time chord transposition
- Chord and roman numeral side-by-side view
- iReal Pro chart import
- Supports all keys

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/mehegan-jazz-harmony/id931192025/reviews.md

### 5/5 — Nice and simple.

*2020-07-11*

It is very nice to practice functional harmony.

## Frequently asked questions about Mehegan Jazz Harmony

### What is Mehegan Jazz Harmony?

Mehegan Jazz Harmony is a free app that demonstrates John Mehegan's roman numeral notation system for jazz harmony. It shows regular chord notation alongside its roman numeral equivalents and allows for real-time modification in all keys.

### How does Mehegan Jazz Harmony work with iReal Pro?

You can import chord charts from the iReal Pro app into Mehegan Jazz Harmony. This is done by sharing a chart from iReal Pro using the "Open in..." option or by pasting it to the clipboard within Mehegan.

### Can I transpose chords in Mehegan Jazz Harmony?

Yes, the app allows for real-time modification and transposition of chords in all keys, facilitating a harmonic approach to jazz.

### Is Mehegan Jazz Harmony available on Android?

Based on the provided data, Mehegan Jazz Harmony is currently supported on iPhone and iPod devices. Information regarding Android availability is not specified.

### Does Mehegan Jazz Harmony have ads?

No, Mehegan Jazz Harmony is ad-free. The application does not contain advertisements.

### What is the age rating for Mehegan Jazz Harmony?

Mehegan Jazz Harmony has an age rating of 4+. This indicates it is suitable for users of all ages.

### When was Mehegan Jazz Harmony last updated?

The app was last updated on November 17, 2014, with version 1.2. It was initially released on November 3, 2014.

### What are the benefits of using roman numeral notation?

Roman numeral notation, as demonstrated by Mehegan Jazz Harmony, represents a harmonic approach to jazz that facilitates transposition in all keys, making it easier to understand and apply chord progressions.

## Version history (last 3 releases)

### 1.2 — 2014-11-17

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

Bug fixes

### 1.1 — 2014-11-07

Better support for iPhone 6 and iPhone 6 Plus.
Fixed crash that occurred in certain keys.

### 1.0 — 2014-11-02

No release notes.

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## More apps by Norman Schmidt

- [Rousseau MusicPad](https://appshunter.io/ios/app/rousseau-musicpad/id428238042)
- [Bach Chorales](https://appshunter.io/ios/app/bach-chorales/id946708194)

All apps by Norman Schmidt: https://appshunter.io/developer/428238046

## Related topics

[mehegan jazz harmony](https://appshunter.io/ios/topics/mehegan-jazz-harmony)

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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.*