# Simple Ring Puzzle vs Kurotto Extreme

The clearest difference is iOS requirement: Simple Ring Puzzle at 8.1 against Kurotto Extreme's 13.0. 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.

Simple Ring Puzzle ships an update every 24 months, Kurotto Extreme every 22 months. The most recent releases landed on September 18, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Simple Ring Puzzle | 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 | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 24 months | **Every 22 months** |
| Monetization | — | Ad-supported |
| Size | 65 MB | 22 MB |
| Requires iOS | **8.1** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ruslan Goncharenko](https://appshunter.io/developer/934710362) | [Christophe Baranger](https://appshunter.io/developer/982794089) |

## What reviewers say

### Simple Ring Puzzle

[App page](https://appshunter.io/ios/app/simple-ring-puzzle/id1355462031)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Simple Ring Puzzle free?

Simple Ring Puzzle is free to download, with no in-app purchases.

### Is Kurotto Extreme free?

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

### Do Simple Ring Puzzle or Kurotto Extreme have ads?

Both Simple Ring Puzzle and Kurotto Extreme show ads.

### Which is updated more often, Simple Ring Puzzle or Kurotto Extreme?

Simple Ring Puzzle ships an update every 24 months, and Kurotto Extreme every 22 months. Most recently, Simple Ring Puzzle was updated on September 18, 2026 and Kurotto Extreme on June 10, 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.*