# CNau vs Set Theory Foundations

The clearest difference is in-app purchases: Set Theory Foundations at none against CNau's 1. Set Theory Foundations also leads on iOS requirement (15.1 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. CNau sells 1 one-off in-app purchase. Set Theory Foundations asks for nothing beyond the download.

## The numbers

| Metric | CNau | Set Theory Foundations |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 24 MB | 38 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rizka Reza Pahlevi](https://appshunter.io/developer/1843548137) | [AFTW LLC](https://appshunter.io/developer/1886356149) |

## What reviewers say

### CNau

[App page](https://appshunter.io/ios/app/cnau/id6753331497)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support CNau | $4.99 | one-time |


### 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 CNau free?

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

### Is Set Theory Foundations free?

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

### Do CNau or Set Theory Foundations have ads?

Neither CNau nor Set Theory Foundations shows ads.

---

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