# KakashiKarasu vs Number Lab

The clearest difference is price: Number Lab at Free against KakashiKarasu's $0.99. Number Lab also leads on update cadence (daily vs every 4 weeks) and iOS requirement (12.0 vs 14.5). KakashiKarasu's advantage is device support (5 vs 3). On ads and in-app purchases there is nothing between them.

Number Lab is free to download; KakashiKarasu costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

KakashiKarasu ships an update every 4 weeks, Number Lab daily. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | KakashiKarasu | Number Lab |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 4 weeks | **Daily** |
| Size | 5 MB | 89 MB |
| Requires iOS | 14.5 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Norio Haga](https://appshunter.io/developer/1546020983) | [FEELCRAFTERS OYUN YAZILIM LIMITED SIRKETI](https://appshunter.io/developer/1691256089) |

## What reviewers say

### KakashiKarasu

[App page](https://appshunter.io/ios/app/kakashikarasu/id1554180902)

**In-app purchases:** none


### Number Lab

[App page](https://appshunter.io/ios/app/number-lab/id6476373137)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KakashiKarasu free?

KakashiKarasu costs $0.99, with no in-app purchases.

### Is Number Lab free?

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

### Do KakashiKarasu or Number Lab have ads?

Both KakashiKarasu and Number Lab show ads.

### Which is updated more often, KakashiKarasu or Number Lab?

KakashiKarasu ships an update every 4 weeks, and Number Lab daily. Most recently, KakashiKarasu was updated on October 13, 2026 and Number Lab on October 25, 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.*