# Knife Challenge vs Radioactive Rabbit

The clearest difference is iOS requirement: Knife Challenge at 9.0 against Radioactive Rabbit's 12.0. On price, update cadence, ads 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.

Knife Challenge ships an update every 18 months, Radioactive Rabbit every 30 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | Knife Challenge | Radioactive Rabbit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 18 months** | Every 30 months |
| Size | 26 MB | 29 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [payal patel](https://appshunter.io/developer/1145207522) | [James McNess](https://appshunter.io/developer/423896417) |

## What reviewers say

### Knife Challenge

[App page](https://appshunter.io/ios/app/knife-challenge/id1444541189)

**Features:** macOS Compatibility

**In-app purchases:** none


### Radioactive Rabbit

[App page](https://appshunter.io/ios/app/radioactive-rabbit/id1460773918)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Knife Challenge free?

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

### Is Radioactive Rabbit free?

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

### Do Knife Challenge or Radioactive Rabbit have ads?

Neither Knife Challenge nor Radioactive Rabbit shows ads.

### Which is updated more often, Knife Challenge or Radioactive Rabbit?

Knife Challenge ships an update every 18 months, and Radioactive Rabbit every 30 months. Most recently, Knife Challenge was updated on October 26, 2026 and Radioactive Rabbit on October 26, 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.*