# Kurotto Extreme vs Slitherlink

The clearest difference is in-app purchases: Kurotto Extreme at none against Slitherlink's 1. Kurotto Extreme also leads on iOS requirement (13.0 vs 18.0). Slitherlink's advantage is ads (none vs shown) and update cadence (every 2 months vs every 22 months). On price and device support there is nothing between them.

Both are free to download. Slitherlink sells 1 one-off in-app purchase. Kurotto Extreme asks for nothing beyond the download.

Kurotto Extreme ships an update every 22 months, Slitherlink every 2 months. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Kurotto Extreme | Slitherlink |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 22 months | **Every 2 months** |
| Monetization | Ad-supported | — |
| Size | 22 MB | 14 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christophe Baranger](https://appshunter.io/developer/982794089) | [DAN URBANEK](https://appshunter.io/developer/1875347262) |

## What reviewers say

### 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


### Slitherlink

[App page](https://appshunter.io/ios/app/slitherlink-loop-puzzle/id6765857599)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Slitherlink Premium Unlock | $3.00 | one-time |


## Frequently asked questions

### Is Kurotto Extreme free?

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

### Is Slitherlink free?

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

### Do Kurotto Extreme or Slitherlink have ads?

Kurotto Extreme shows ads; Slitherlink does not.

### Which is updated more often, Kurotto Extreme or Slitherlink?

Kurotto Extreme ships an update every 22 months, and Slitherlink every 2 months. Most recently, Kurotto Extreme was updated on October 5, 2026 and Slitherlink on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*