# iSystem vs Cat CPU System

The clearest difference is device support: Cat CPU System at 3 against iSystem's —. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | iSystem | Cat CPU System |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Weekly |
| Size | 2 MB | 39 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Zack Smith](https://appshunter.io/developer/388860537) | [Brook Design, LLC](https://appshunter.io/developer/1190785004) |

## What reviewers say

### iSystem

[App page](https://appshunter.io/ios/app/isystem/id454947443)

**In-app purchases:** none


### Cat CPU System

[App page](https://appshunter.io/ios/app/cat-cpu-system/id6695728672)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iSystem free?

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

### Is Cat CPU System free?

Cat CPU System is free to download, with no in-app purchases.

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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.*