# Enigma Semi vs Cat CPU System

The clearest difference is in-app purchases: Cat CPU System at none against Enigma Semi's 12. Cat CPU System also leads on update cadence (weekly vs every 2 months). Enigma Semi's advantage is iOS requirement (9.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Enigma Semi sells 12 one-off in-app purchases. Cat CPU System asks for nothing beyond the download.

Enigma Semi ships an update every 2 months, Cat CPU System weekly. The most recent releases landed on October 14, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Enigma Semi | Cat CPU System |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 5 MB | 39 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DILTS JAPAN, LIMITED LIABILITY CO.](https://appshunter.io/developer/780416956) | [Brook Design, LLC](https://appshunter.io/developer/1190785004) |

## What reviewers say

### Enigma Semi

[App page](https://appshunter.io/ios/app/enigma-semi-full-pro-mode/id1454383757)

**Features:** macOS Compatibility

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CYGNUS-X SE44J | $3.99 | one-time |
| GROM JC61 | $3.99 | one-time |
| GROM JC75 | $3.99 | one-time |
| MONKEY125 JB02 | $3.99 | one-time |
| Z125 Pro | $3.99 | one-time |
| SUPER CUB C125 JA58 | $3.99 | one-time |
| HUNTER CUB CT125 JA65 | $3.99 | one-time |
| DAX125 JB04/JB06 | $3.99 | one-time |
| CROSS CUB CC110 JA60 | $3.99 | one-time |
| GROM 8BJ-JC92 | $3.99 | one-time |
| GROM 2BJ-JC92 | $3.99 | one-time |
| MONKEY125 JB03/JB05 | $3.99 | one-time |


### 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 Enigma Semi free?

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

### Is Cat CPU System free?

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

### Do Enigma Semi or Cat CPU System have ads?

Neither Enigma Semi nor Cat CPU System shows ads.

### Which is updated more often, Enigma Semi or Cat CPU System?

Enigma Semi ships an update every 2 months, and Cat CPU System weekly. Most recently, Enigma Semi was updated on October 14, 2026 and Cat CPU System on October 20, 2026.

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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.*