# Set Theory Calculator — Pitch Set Analysis Tool

> Musical set theory analysis tool for pitch class sets. (iPhone/iPad app by L Tomlin.)

- Source: https://appshunter.io/ios/app/set-theory-calculator/id791334943 (this page in markdown: same URL + `.md`)
- Developer: [L Tomlin](https://appshunter.io/developer/791334946)
- Category: Music, Education
- Price: $3.99
- Rating: 5.00/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 2 MB
- Languages: American English
- Released: 2014-01-10
- Data updated: 2026-09-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/set-theory-calculator/id791334943/reviews.md

## What is Set Theory Calculator?

Set Theory Calculator is a musical set theory analysis tool and compositional aid. Using the app, you can define pitch class sets, then analyze and perform various musical set theory operations on the sets. 

For pitch sets you define, the app will:

 * Calculate Normal Form and Prime Form
 * Display the Forte Number
 * Calculate the interval class vector
 * Show transposed and inverted sets
 * Display a set matrix
 * Sort, invert or complement the set
 * Play the notes of the set as a melody or chord

The app also includes a comprehensive written overview of musical set theory. Composers like Arnold Schoenberg, Alban Berg and Anton Webern employed set theory techniques to organize the pitch content of their works.

## Key features

- Calculate Normal Form and Prime Form
- Display Forte Number
- Calculate interval class vector
- Transpose and invert sets
- Display set matrix
- Sort, invert, or complement sets
- Play sets as melody or chord

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/set-theory-calculator/id791334943/reviews.md

### 5/5 — Essential music theory study companion

*2026-09-09*

This app saved me with my theory assignments!

### 5/5 — Thank you

*2014-01-28*

Thanks for putting this together

## Frequently asked questions about Set Theory Calculator

### What is the Post-Tonal Theory Calculator?

The Post-Tonal Theory Calculator is a tool for analyzing musical pitch class sets using post-tonal music theory. It helps composers and theorists understand the structure and relationships within atonal music.

### What musical set theory concepts does the app cover?

The app calculates Normal Form, Prime Form, Forte Number, and interval class vectors for pitch sets. It also allows for transposition, inversion, and complementation of sets, and displays a set matrix.

### Can I hear the pitch sets?

Yes, the Post-Tonal Theory Calculator allows you to play the notes of a defined pitch set as either a melody or a chord, helping you to audiate the theoretical concepts.

### Does the Post-Tonal Theory Calculator include educational material?

Yes, the app includes a comprehensive written overview of musical set theory, providing context and explanations for the analytical tools it offers.

### What devices does the Post-Tonal Theory Calculator support?

The Post-Tonal Theory Calculator is available for iPhone and iPod devices, as indicated by its supported devices list.

### How much does the Post-Tonal Theory Calculator cost?

The Post-Tonal Theory Calculator is a paid application, priced at $3.99. There are no in-app purchases or advertisements associated with its use.

### How often is the Post-Tonal Theory Calculator updated?

The latest version of the Post-Tonal Theory Calculator is 1.0.4, which was last updated on August 6, 2018. This indicates infrequent updates.

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

The Post-Tonal Theory Calculator has an age rating of 4+, making it suitable for a wide range of users interested in music theory.

## Version history (last 5 releases)

### 2.0.3 — 2026-09-13

* Added options for pitch set display styles
 * The matrix display now honors the pitch set display style
 * Bug fixes related to Forte Numbers 5-3, 7-3 and 7-34

### 2.0.2 — 2026-09-13

Pitch set analysis improvements:
 * Inverting a set maintains the same starting pitch as the original set
 * Matrix view shows Primary, Retrograde, Inversion and Retrograde Inversion labels
 * Preset definitions include pitch sets from common 12-tone study pieces

### 2.0.1 — 2026-09-11

The app name is updated from 'Post-Tonal Theory Calculator' to 'Set Theory Calculator'. The home screen icon label is changed from 'SetCalc' to 'Set Theory'.

### 2.0.0 — 2026-09-09

This version provides a complete user interface refresh to modernize the look and feel, make better use of available screen space, and add support for dark mode.

### 1.0.4 — 2018-08-06

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

- Fixes a bug where Normal Form for some pitch sets was calculated incorrectly
 - Addresses UI layout issues on larger iPhone screens

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## Related topics

[post-tonal](https://appshunter.io/ios/topics/post-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 2026-09-24.*