# Post-Tonal Tool Kit

> Post-tonal music analysis tool for pitch-class sets and tone rows. (iPhone/iPad app by A Squared Applications.)

- Source: https://appshunter.io/ios/app/post-tonal-tool-kit/id626579886 (this page in markdown: same URL + `.md`)
- Developer: [A Squared Applications](https://appshunter.io/developer/626580049)
- Category: Music, Utilities
- Price: $4.99
- Rating: 4.30/5 from 6 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 1 MB
- Languages: American English
- Released: 2013-04-02
- Data updated: 2026-08-09
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/post-tonal-tool-kit/id626579886/reviews.md

## What is Post?

The Post-Tonal Tool Kit is designed to be a one-stop app for pitch-class and tone row analysis of post-tonal music. Features include a PC Set Calculator, a Subset/Superset Calculator, and a Matrix Calculator.

–This app is perfect for the music theory student analyzing post-tonal music.

–This app is also designed for the classroom and pedagogical uses.
   * With an Apple Dock Connector the screen can be projected in the classroom.
   * Analytical assignments can be designed to incorporate the features of the app that highlight relationships within sets and rows.

The PC Set Calculator analyzes sets ranging from three to twelve pitches and provides: 
   * Forte name
   * Normal form
   * Prime form
   * IC Vector 
   * Z-Mate
   * Tn Invariance 
   * TnI Invariance

The calculator also will provide the inversion and complement sets with all the above information and all sets can be analyzed for subset and superset relationships (a very handy tool when analyzing Webern!).

**WHAT’S NEW!!!**

The Matrix Calculator will generate a matrix with any number of pitches up to twelve. The rows are numbered using the Straus/Roig-Francoli system (Introduction to Post-Tonal Theory/ Understanding Post-Tonal Music), where the P and I row labels correspond to the starting pitch class.

Any number of pitch classes within the matrix can be highlighted and the selected set then sent back into the PC Set Calculator. This feature is extremely helpful when comparing trichords, tetrachords, and hexachords!

## Key features

- PC Set Calculator
- Subset/Superset Calculator
- Matrix Calculator
- Forte name analysis
- Normal form calculation
- Prime form identification
- Tone row analysis

## Chart rankings

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

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/post-tonal-tool-kit/id626579886/reviews.md

### 4/5 — Used to love it, but...

*2017-10-18, version 2.0*

Apple decided i am no longer allowed to use it!   Any chance of an iOs 11 compatible update?
This was a great utility, did everything and did it in an easy to use way.

### 3/5 — Forte numbers only for subset/superset lists?

*2016-10-20, version 2.0*

I purchased this app for its subset/superset feature and was a bit disappointed to find that the subsets/supersets tab for a given set lists Forte numbers only (and not the "prime form" set class labels). Maybe now I'll finally learn them…

### 5/5 — Fantastic!

*2014-03-07, version 2.0*

This is one of the most useful and comprehensive apps I have ever come across. The interface is beautifully smooth and the analysis is extremely well laid out and complete, and above all it works fast and even does matrices of <12. I highly recommend this to anyone who frequently uses post-tonal theory, and the only future feature I could possibly ask for would be a sound feature where you can also hear your row played. Great work on one of the most useful apps I have ever found.

### 3/5 — A good start

*2013-04-14, version 1.0*

Pros:
Easy to use, superset/subset relation is nice, forthcoming matrix is promising

Cons:
Should give prime forms in addition to forte names
Would be nice to have access to all of the info in the list of set classes

Some minor improvements will make this very good

## Frequently asked questions about Post

### What is the Post-Tonal Tool Kit used for?

The Post-Tonal Tool Kit is designed for analyzing post-tonal music. It offers features like a PC Set Calculator, Subset/Superset Calculator, and Matrix Calculator to help users identify musical relationships within sets and rows.

### What specific analytical information does the PC Set Calculator provide?

The PC Set Calculator provides Forte name, normal form, prime form, IC Vector, Z-Mate, Tn Invariance, and TnI Invariance for sets ranging from three to twelve pitches. It also provides inversion and complement sets with this information.

### How does the Matrix Calculator work in the Post-Tonal Tool Kit?

The Matrix Calculator generates a matrix for any number of pitches up to twelve, using the Straus/Roig-Francoli system for row labeling. Users can highlight pitch classes within the matrix and send selected sets back to the PC Set Calculator for comparison.

### Is the Post-Tonal Tool Kit suitable for classroom projection?

Yes, with an Apple Dock Connector, the screen can be projected in a classroom. This allows for pedagogical uses and the design of analytical assignments that highlight relationships within sets and rows.

### What is the price of the Post-Tonal Tool Kit?

The Post-Tonal Tool Kit is a paid application, priced at $4.99. This is a one-time purchase with no additional in-app purchases or subscriptions.

### What devices does the Post-Tonal Tool Kit support?

The Post-Tonal Tool Kit is supported on iPhone and iPod devices. It is not currently available for Android or other platforms.

### How often is the Post-Tonal Tool Kit updated?

The latest version of the Post-Tonal Tool Kit is 3.01, last updated on January 16, 2018. While updates have not been frequent recently, the app has been stable for its users.

### Does the Post-Tonal Tool Kit have ads?

No, the Post-Tonal Tool Kit is ad-free. Users can enjoy the full functionality of the app without any advertisements interrupting their analysis.

## Version history (last 4 releases)

### 3.01 — 2018-01-16

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

Updated for the latest version of iOS

### 2.0 — 2013-08-12

Matrix Calculator Added
Transfer from Matrix Calculator to PC Set Calculator Added

### 1.01 — 2013-06-09

Bug Fixes
 - fixed incorrect forte values in database
 - improved spacing of keys/notes in note set
 - changed "submit" to "calculate"

### 1.0 — 2013-04-02

No release notes.

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## Related topics

[tonal](https://appshunter.io/ios/topics/tonal)

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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 2026-08-09.*