# Set Theory Calculator vs SetClass

The clearest difference is update cadence: Set Theory Calculator at every 3 weeks against SetClass's every 2 months. Set Theory Calculator also leads on chart position (#192 vs unranked) and price ($3.99 vs $4.99). SetClass's advantage is iOS requirement (18.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Set Theory Calculator costs $3.99 and SetClass $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Set Theory Calculator ships an update every 3 weeks, SetClass every 2 months. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Set Theory Calculator | SetClass |
| --- | --- | --- |
| Price | **$3.99** | $4.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/set-theory-calculator/id791334943/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Paid | — |
| Best chart rank | **#192** | — |
| Size | 8 MB | 88 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [L Tomlin](https://appshunter.io/developer/791334946) | [Martin Adler](https://appshunter.io/developer/1896354791) |

## What reviewers say

### Set Theory Calculator

[App page](https://appshunter.io/ios/app/set-theory-calculator/id791334943)

**Currently charting:** #192 Top Paid · Music (US App Store)

This app analyzes musical pitch class sets using post-tonal theory. It calculates normal and prime forms, displays Forte numbers, and generates interval class vectors. Users can also transpose, invert, complement, and play sets as melodies or chords, with an included overview of set theory.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### SetClass

[App page](https://appshunter.io/ios/app/setclass/id6785144247)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Set Theory Calculator free?

Set Theory Calculator costs $3.99, with no in-app purchases.

### Is SetClass free?

SetClass costs $4.99, with no in-app purchases.

### Do Set Theory Calculator or SetClass have ads?

Neither Set Theory Calculator nor SetClass shows ads.

### Which is updated more often, Set Theory Calculator or SetClass?

Set Theory Calculator ships an update every 3 weeks, and SetClass every 2 months. Most recently, Set Theory Calculator was updated on October 10, 2026 and SetClass on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*