# Kakuso Challenge vs Kurotto Extreme

The clearest difference is in-app purchases: Kurotto Extreme at none against Kakuso Challenge's 3. Kakuso Challenge's advantage is update cadence (every 6 months vs every 22 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Kakuso Challenge sells 3 one-off in-app purchases. Kurotto Extreme asks for nothing beyond the download.

Kakuso Challenge ships an update every 6 months, Kurotto Extreme every 22 months. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Kakuso Challenge | Kurotto Extreme |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kurotto-extreme/id1499171663/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 6 months** | Every 22 months |
| Monetization | — | Ad-supported |
| Size | 17 MB | 22 MB |
| Requires iOS | 13.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alven Kam](https://appshunter.io/developer/1227687322) | [Christophe Baranger](https://appshunter.io/developer/982794089) |

## What reviewers say

### Kakuso Challenge

[App page](https://appshunter.io/ios/app/kakuso-challenge/id1485845940)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kakuso Challenge 20 Hints | $0.99 | one-time |
| Kakuso Challenge 50 Hints | $1.99 | one-time |
| Kakuso Challenge 100 Hints | $2.99 | one-time |


### Kurotto Extreme

[App page](https://appshunter.io/ios/app/kurotto-extreme/id1499171663)

A logic puzzle game originating from Japan with simple rules for hours of engaging challenges. Fill empty cells based on numbered circles indicating continuous black cells, with no time limits and autosave functionality.

**Highlights:** 350+ challenges across 7 difficulty levels, 7 new daily challenges, Autosave progress, No time limits, 2 global leaderboards, Full tutorial

**In-app purchases:** none


## Frequently asked questions

### Is Kakuso Challenge free?

Kakuso Challenge is free to download, with in-app purchases available.

### Is Kurotto Extreme free?

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

### Do Kakuso Challenge or Kurotto Extreme have ads?

Both Kakuso Challenge and Kurotto Extreme show ads.

### Which is updated more often, Kakuso Challenge or Kurotto Extreme?

Kakuso Challenge ships an update every 6 months, and Kurotto Extreme every 22 months. Most recently, Kakuso Challenge was updated on October 7, 2026 and Kurotto Extreme on October 5, 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.*