# Another Turing Machine vs Set Theory Foundations

The clearest difference is price: Set Theory Foundations at Free against Another Turing Machine's $1.99. Set Theory Foundations also leads on iOS requirement (15.1 vs 18.2). On ads, in-app purchases and device support there is nothing between them.

Set Theory Foundations is free to download; Another Turing Machine costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Another Turing Machine | Set Theory Foundations |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Daily | — |
| Size | 1 MB | 38 MB |
| Requires iOS | 18.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [Stefan JOSTEN](https://appshunter.io/developer/949662361) | [AFTW LLC](https://appshunter.io/developer/1886356149) |

## What reviewers say

### Another Turing Machine

[App page](https://appshunter.io/ios/app/another-turing-machine/id6742148242)

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

**In-app purchases:** none


### Set Theory Foundations

[App page](https://appshunter.io/ios/app/set-theory-foundations/id6773423842)

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

**In-app purchases:** none


## Frequently asked questions

### Is Another Turing Machine free?

Another Turing Machine costs $1.99, with no in-app purchases.

### Is Set Theory Foundations free?

Set Theory Foundations is free to download, with no in-app purchases.

### Do Another Turing Machine or Set Theory Foundations have ads?

Neither Another Turing Machine nor Set Theory Foundations shows ads.

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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.*