# GetPrincipia vs Set Theory for Computing

The clearest difference is in-app purchases: Set Theory for Computing at none against GetPrincipia's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. GetPrincipia sells 2 in-app purchases, starting at $6.99 per month. Set Theory for Computing asks for nothing beyond the download.

## The numbers

| Metric | GetPrincipia | Set Theory for Computing |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 38 MB | 38 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Axiom 38 LLC](https://appshunter.io/developer/1887968723) | [AFTW LLC](https://appshunter.io/developer/1886356149) |

## What reviewers say

### GetPrincipia

[App page](https://appshunter.io/ios/app/getprincipia/id6761139348)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $6.99 | per month |
| Annual | $44.99 | per year |


### Set Theory for Computing

[App page](https://appshunter.io/ios/app/set-theory-for-computing/id6773874925)

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

**In-app purchases:** none


## Frequently asked questions

### Is GetPrincipia free?

GetPrincipia is free to download, with in-app purchases available.

### Is Set Theory for Computing free?

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

### Do GetPrincipia or Set Theory for Computing have ads?

Neither GetPrincipia nor Set Theory for Computing 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.*