# Post Tonal Calculator — Music Tools for Composers

> Free 12-tone matrix calculator for atonal music composition. (iPhone/iPad app by John Holland.)

- Source: https://appshunter.io/ios/app/post-tonal-calculator/id1468252366 (this page in markdown: same URL + `.md`)
- Developer: [John Holland](https://appshunter.io/developer/1468252365)
- Category: Music, Productivity, Music
- Price: Free
- Rating: 4.50/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.3 · 33 MB
- Languages: English, French
- Released: 2019-06-19
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/post-tonal-calculator/id1468252366/reviews.md

## What is Post Tonal Calculator?

This free 12-tone Matrix Calculator is perfect for musicians who wish to experiment with melody and harmony using the techniques of 'atonal' tone rows. The Post Tonal Calculator allows you to choose notes or generate them randomly, explore sequences of intervals as short as 3 tones and as long as a twelve-tone tone row. The Post Tonal Matrix Calculator will then generate a matrix of tone rows based on your primary row, giving you all of the possible interval-consistent prime rows, retrograde, inversions, and retrograde-inversions.

## Key features

- 12-tone matrix calculator
- Generate tone rows
- Explore interval sequences
- Prime rows, retrograde, inversions
- Random note generation

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/post-tonal-calculator/id1468252366/reviews.md

### 4/5 — Good app, but no ability to save

*2023-10-03*

Nice app, but there is no ability to save or export the matrix. It kind of makes the app a dead end. I’m back to just using a spreadsheet for creating a matrix again since I don’t lose everything when the app closes.

## Frequently asked questions about Post Tonal Calculator

### What is the Post Tonal Calculator used for?

The Post Tonal Calculator is a free tool designed for musicians to experiment with atonal music composition. It helps in generating and exploring tone rows and their variations based on 12-tone techniques.

### Can I generate tone rows randomly with Post Tonal Calculator?

Yes, the Post Tonal Calculator allows you to choose notes manually or generate them randomly to create your primary tone row for further analysis.

### What types of tone row variations does Post Tonal Calculator generate?

Post Tonal Calculator generates a matrix of tone rows based on your primary row, including all possible interval-consistent prime rows, retrograde, inversions, and retrograde-inversions.

### Is Post Tonal Calculator free to use?

Yes, the Post Tonal Calculator is completely free to use, with no in-app purchases or advertisements.

### What devices is Post Tonal Calculator available on?

Post Tonal Calculator is available on iPhone, iPad, and iPod, indicated by its supported devices list.

### How often is Post Tonal Calculator updated?

The latest version of Post Tonal Calculator is 1.1.5, which was last updated on September 29, 2019. This suggests infrequent updates.

### What is the age rating for Post Tonal Calculator?

Post Tonal Calculator has an age rating of 4+, making it suitable for a wide range of users.

### Does Post Tonal Calculator have ads?

No, Post Tonal Calculator does not contain advertisements, as indicated by the 'hasAds' flag being false.

## Version history (last 2 releases)

### 1.1.5 — 2019-09-29

Play tone rows using one of four sound samples. New user settings page for saving your preferred notation, accidentals, choice of instrument and playback tempo. Performance improvements and minor bug fixes.

### 1.0 — 2019-06-18

No release notes.

## Apps similar to Post Tonal Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Music By Numbers](https://appshunter.io/ios/app/music-by-numbers/id1623018554) | 5.0 (6) | Free | Music |
| [Fluss - Granular Playground](https://appshunter.io/ios/app/fluss-granular-playground/id6443472888) | 4.8 (68) | $13.99 | Music |

## More apps by John Holland

- [DFB Periodic Table](https://appshunter.io/ios/app/dfb-periodic-table/id1496656920)
- [Free The Glutens - Cartoon Fun](https://appshunter.io/ios/app/free-the-glutens-cartoon-fun/id1564309875)

All apps by John Holland: https://appshunter.io/developer/1468252365

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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 2026-06-01.*