# Neo-Riemannian

> Visualizes and explains Neo-Riemannian theory for chromatic harmony. (iPhone/iPad app by Martin Adler.)

- Source: https://appshunter.io/ios/app/neo-riemannian/id6777607274 (this page in markdown: same URL + `.md`)
- Developer: [Martin Adler](https://appshunter.io/developer/1896354791)
- Category: Music, Education
- Price: $2.99
- Rating: 4.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 18.0 · 32 MB
- Languages: American English, European Spanish
- Released: 2026-06-11
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/neo-riemannian/id6777607274/reviews.md

## What is Neo?

Explore the hidden geometry of chromatic harmony through Neo-Riemannian Theory — an elegant mathematical framework for understanding how major and minor chords connect through smooth voice leading.

TAP ANY CHORD
Touch any of the 24 major and minor triads arranged in the Cube Dance. Watch the chord light up and hear it ring out as a sustained pad.

APPLY TRANSFORMATIONS
Six Neo-Riemannian operations (L, P, R, N, H, S) connect chords by moving one or two voices by a semitone. Each button shows you the target chord before you tap it.

CONTINUOUS VOICE LEADING
The audio engine keeps common tones sustained and moves only the voices that change. Choose from five sound presets: Rhodes, Strings, Choir, Organ, or Synth Pad.

THEORY REFERENCE
The built-in Theory tab explains every operation with voice-movement diagrams, hexatonic cycles, Weitzmann regions, and academic references from Riemann (1893) to Douthett & Steinbach (1998).

Perfect for music theory students, composers, and anyone fascinated by the mathematics of harmony.

## Key features

- Explore 24 major/minor triads
- Apply six Neo-Riemannian operations
- Hear continuous voice leading
- Five sound presets
- Built-in theory reference


## Frequently asked questions about Neo

### What is Neo-Riemannian theory?

Neo-Riemannian theory is a mathematical framework that describes how major and minor chords connect through smooth voice leading, focusing on semitone movements.

### What are the Neo-Riemannian operations?

The app features six operations: L, P, R, N, H, and S, which connect chords by moving one or two voices by a semitone. Each button displays the target chord before activation.

### What sound presets are available in Neo-Riemannian?

Neo-Riemannian offers five sound presets for its audio engine: Rhodes, Strings, Choir, Organ, and Synth Pad, all designed to sustain common tones.

### Does Neo-Riemannian have ads?

No, Neo-Riemannian is an ad-free application.

### What devices does Neo-Riemannian support?

Neo-Riemannian is available for iPhone and iPad.

### How often is Neo-Riemannian updated?

The app was last updated on June 11, 2026, with version 1.0. Future updates will depend on developer plans.

### What is the age rating for Neo-Riemannian?

Neo-Riemannian has an age rating of 4+.

### What is the price of Neo-Riemannian?

Neo-Riemannian costs $2.99 and does not feature in-app purchases.

## Version history (last 1 release)

### 1.0 — 2026-06-11

No release notes.

## More apps by Martin Adler

- [Reharmonizator](https://appshunter.io/ios/app/reharmonizator/id6767040541)
- [Negative Harmony](https://appshunter.io/ios/app/negative-harmony/id6781442884)
- [Choral Lab](https://appshunter.io/ios/app/choral-lab/id6782184585)
- [Particls](https://appshunter.io/ios/app/particls/id6783961985)
- [Padscape](https://appshunter.io/ios/app/padscape/id6785107448)

All apps by Martin Adler: https://appshunter.io/developer/1896354791

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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 2026-08-24.*