# Zen Power Exam vs CritterBlock

The clearest difference is device support: Zen Power Exam at 2 against CritterBlock's —. Zen Power Exam also leads on iOS requirement (12.0 vs 17.2). On price and in-app purchases 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 | Zen Power Exam | CritterBlock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | — |
| Update frequency | Every 8 days | — |
| Size | 40 MB | 19 MB |
| Requires iOS | **12.0** | 17.2 |
| Devices | **iPhone, iPod** | — |
| Age rating | 17+ | 4+ |
| Developer | [Katsuya Kawase](https://appshunter.io/developer/1749728640) | [mizuto segawa](https://appshunter.io/developer/1764904284) |

## What reviewers say

### Zen Power Exam

[App page](https://appshunter.io/ios/app/zen-power-exam/id6504720230)

**Features:** macOS Compatibility

**In-app purchases:** none


### CritterBlock

[App page](https://appshunter.io/ios/app/critterblock/id6667110511)

**In-app purchases:** none


## Frequently asked questions

### Is Zen Power Exam free?

Zen Power Exam is free to download, with no in-app purchases.

### Is CritterBlock free?

CritterBlock 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.*