# Another Turing Machine vs Proof Fidget

The clearest difference is price: Proof Fidget at Free against Another Turing Machine's $1.99. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Proof Fidget 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 | Proof Fidget |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/proof-fidget/id6759361942/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Daily | — |
| Monetization | — | Free |
| Size | 1 MB | 10 MB |
| Requires iOS | 18.2 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stefan JOSTEN](https://appshunter.io/developer/949662361) | [Matthew Murphy](https://appshunter.io/developer/1263295014) |

## 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


### Proof Fidget

[App page](https://appshunter.io/ios/app/proof-fidget/id6759361942)

Engage with math through interactive puzzles that build proofs step-by-step. Learn logic, algebra, number theory, and geometry by making correct moves and receiving immediate feedback. Develop intuition for abstract concepts in short, satisfying sessions.

**Highlights:** Puzzle-driven math learning, Step-by-step proof building, Logic and proof techniques, Algebraic transformations, Number theory practice, Geometry and visual aids

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Another Turing Machine free?

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

### Is Proof Fidget free?

Proof Fidget is free to download, with no in-app purchases.

### Do Another Turing Machine or Proof Fidget have ads?

Neither Another Turing Machine nor Proof Fidget 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.*