# TumeKyouen

> Geometric puzzle game to find four points on a common circle. (iPhone/iPad app by NOBORU ISHIKURA.)

- Source: https://appshunter.io/ios/app/tumekyouen/id792426923 (this page in markdown: same URL + `.md`)
- Developer: [NOBORU ISHIKURA](https://appshunter.io/developer/792426926)
- Category: Games, Education, Board, Puzzle
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 15.0 · 31 MB
- Languages: English, Japanese
- Released: 2014-01-11
- Data updated: 2026-06-24
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/tumekyouen/id792426923/reviews.md

## What is TumeKyouen?

Kyouen (共円) is a geometric concept describing four or more points that all lie on a single circle.
"Tsume Kyouen" is a puzzle game where you find the combination of stones that satisfies this condition.

Select four stones from those placed on the board and find the "kyouen" — the arrangement where all four lie on a common circle. The rules are straightforward, but as the board grows more complex, spatial reasoning becomes essential.

Features
- A mathematical puzzle grounded in geometry
- Over 10,000 stages with varied challenges
- A clean design that keeps the focus on the puzzle
- Save and sync your progress with account sign-in

Great for fans of mathematics, geometry, or logic-based puzzles.

## Key features

- Geometric puzzle gameplay
- Over 10,000 stages
- Spatial reasoning challenges
- Clean, focused design
- Progress saving and syncing


## Frequently asked questions about TumeKyouen

### What is TumeKyouen?

TumeKyouen is a puzzle game based on the geometric concept of 'kyouen,' where you find combinations of four stones that lie on a single circle. It's designed to challenge your spatial reasoning and logic skills.

### How many stages are in TumeKyouen?

TumeKyouen offers a vast amount of content with over 10,000 stages, providing a long-lasting and varied puzzle experience for players.

### Does TumeKyouen have ads?

Yes, TumeKyouen contains advertisements. As a free game, ads are used to support its development and availability.

### Can I save my progress in TumeKyouen?

Yes, TumeKyouen allows you to save and sync your progress by signing in with an account. This ensures you can pick up where you left off across devices.

### What devices does TumeKyouen support?

TumeKyouen is available on iPhone, iPad, and iPod, making it accessible to a wide range of Apple users looking for a geometric puzzle challenge.

### Is TumeKyouen suitable for children?

TumeKyouen has an age rating of 4+, indicating it is suitable for young players. Its educational basis in geometry and logic can be beneficial for cognitive development.

### How often is TumeKyouen updated?

The latest version of TumeKyouen is 4.1.3, and it was last updated on May 31, 2026. This suggests a history of ongoing development and support for the game.

### What is the user rating for TumeKyouen?

TumeKyouen has received a perfect rating of 5.0 stars from one rating. This indicates a highly positive initial reception from its players.

## Version history (last 5 releases)

### 4.1.3 — 2026-05-31

Added a hint feature.
You can now get hints for difficult stages by watching an ad.

### 4.1.2 — 2026-05-16

Fixed an issue with the kyouen detection logic. Correct stone selections that were not being recognized as valid solutions will now work as expected.

### 4.1.1 — 2026-05-12

Fix problem

### 3.0.1 — 2019-05-01

Fix create screen for iPad.

### 3.0.0 — 2019-03-04

New Feature: You can create stage.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-24.*