# AI KataGo Go: Tsumego — AI Go & Tsumego

> Mobile Go game with the strongest AI KataGo, offering analysis and training. (iPhone/iPad app by Nextio Co., Ltd..)

- Source: https://appshunter.io/ios/app/ai-katago-go-tsumego/id1560986333 (this page in markdown: same URL + `.md`)
- Developer: [Nextio Co., Ltd.](https://appshunter.io/developer/1560986335)
- Category: Games, Board
- Price: Free with in-app purchases
- Rating: 3.40/5 from 7 App Store ratings · 21 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 123 MB
- Languages: Korean, American English, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2021-04-06
- Data updated: 2026-08-20
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/ai-katago-go-tsumego/id1560986333/reviews.md

## What is AI KataGo Go?

1. Enjoy a game of Go against the strongest AI, KataGo, easily on your mobile device.

• A top-tier advanced AI Go engine that surpasses professional players.
• Improve your Go strength anytime, anywhere, right from your mobile device.
• Since the Go calculation runs on a powerful GPU server, there is no burden of device heating or battery drain.
• Choose your desired playing strength from a total of 30 levels, combining 5 KataGo levels and 6 reading-depth levels.
• There is no time limit for games, and your games are saved automatically.
• You can continue your game anytime.

2. Tsumego

• Includes over 27,000 tsumego problems by rank, from 30 kyu to 9 dan.
• Earn stars based on the number of attempts used to solve each tsumego problem.
• Review and replay problems according to the number of stars you earned.

3. AI Recommended Moves and Variations

• Ask KataGo to find the top 3 recommended moves for the next move.
• View the variations KataGo expects for each recommended move.
• Improve your Go strength through recommended moves and variations.

4. AI Position Judgment

• Unlike humans, AI does not simply count territory. It judges the position by estimating the strength of ownership.
• Ownership is displayed by the size of squares, allowing you to understand how AI evaluates the position.

5. A New Type of Go Game

• Compete on equal terms with “Opening Game.”
• Even professional players find it difficult to play an even game or one-stone handicap game against KataGo. But what about limiting the game to the opening?
• Within the first 60 moves, choose the first 5 moves and play the opening you want.
• See how AI responds to various openings. Before long, you may find yourself becoming stronger in the opening.

6. AI Recommended Moves and AI Position Judgment in Try Mode and Review

• Beyond simply trying out moves, you can use AI Recommended Moves and AI Position Judgment on either Black’s or White’s turn to understand various possible developments.
• Playing against a good teacher is important in Go, but review is just as important. Since AI Recommended Moves and AI Position Judgment are also available during review, you can study effectively.

## Key features

- Play against the strongest AI KataGo
- Study opening games with AI
- Unlimited game time
- AI best move suggestions with variations
- AI game judging and ownership analysis

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Buy 1,000 Gold | $0.49 | one-time |
| Buy 3,900 Gold | $1.99 | one-time |
| Buy 10,000 Gold | $5.99 | one-time |
| Buy 22,500 Gold | $11.99 | one-time |
| Buy 60,000 Gold | $22.99 | one-time |
| 9-7 Kyu Tsumego Package | $8.99 | one-time |
| Remove Banner Ads | $4.99 | one-time |
| 12-10 Kyu Tsumego Package | $9.99 | one-time |
| 15-13 Kyu Tsumego Package | $6.99 | one-time |
| 6-4 Kyu Tsumego Package | $9.99 | one-time |
| 3-1 Kyu Tsumego Package | $9.99 | one-time |


## Recent user reviews (10 of 21)

All indexed reviews: https://appshunter.io/ios/app/ai-katago-go-tsumego/id1560986333/reviews.md

### 1/5 — 씨~발 인공지능 수준 낮춰라

*2026-04-27*

낮추라고

### 1/5 — 착수

*2025-06-29*

1선에 착수가 매우 안되는 문제가 아직도 그러네요…
1선 착수의 문제로 시간패도 나오고 짜증납니다.

**Developer response:** 이제 모든 문제가 해결된 상태입니다.
감사합니다.

### 5/5 — 아마추어 레벨은 기력이 어떻게 되나요?

*2025-05-16*

아마추어 레벨 상중하의 기력은 어느정도나요?

### 2/5 — 一定要克金

*2025-04-27, version 1.1.20*

一定要克金

### 1/5 — 課金してもコイン貰えず、対応も悪い

*2024-08-22*

課金してもコインが反映されず
問い合わせをしたら
「証拠の画像を見せてください」
と言われ、この時点で最悪の対応ですが
手間をかけて証拠の画像を集め送信すると
軽い謝罪と「コイン反映させました」との言葉だけでした。

多少の不具合は多めに見るとしても
対応の悪さはどうなのかね？
お金払って商品よこさないのは論外だし
対応の悪さも相まって最悪だと思いました。

### 5/5 — 무료체험

*2024-01-10*

1800굘드만충전해주실수있나요

### 3/5 — 좌 우변 1선에 안 놓아 집니다

*2024-01-06*

Ui도 좋고 한데, 좌 우변은 1선에 안 놓아 져요 ㅠ

아이폰 x 입니다

**Developer response:** 이제 모든 문제가 해결된 상태입니다. 감사합니다.

### 1/5 — 라라라르라르르르르르루두더

*2023-07-26*

돈이나먹고 ㄱ ㄱ      ㅓ          ㅈ          ㅕ

### 3/5 — 결제 헀는데 충전이 안됩니다

*2023-02-02*

결제내역
페이코 
2월2일 18시41분
하나sk카드 (2*3*）
결제금액9900원
확인 부탁 드립니다.

### 5/5 — 리뷰 보이게 일단 5개 준다

*2022-07-29*

최고난도로 설정해서 ㅈ 빠지게 ㅈㄴ 못하네 어떻게 이딴걸로 연습을 하라는 건지 이거 개발자 도대체 뭐하는 사람인지 참 이딴거 만들고 돈 벌려는 속성 역겹다

## Frequently asked questions about AI KataGo Go

### What is AI KataGo Go?

AI KataGo Go is a mobile application that allows users to play the board game Go against the powerful KataGo AI. It brings the advanced capabilities of the PC version to mobile, simplifying installation and access.

### Can I play AI KataGo Go offline?

The provided description does not explicitly state whether AI KataGo Go supports offline play. However, AI games typically require processing power, so an internet connection might be necessary for optimal performance.

### Does AI KataGo Go have multiplayer?

The description focuses on playing against the AI KataGo. It does not mention any features for playing against other human players, either online or locally.

### How does the 'Opening Game' feature work in AI KataGo Go?

The 'Opening Game' feature allows you to compete with KataGo on even terms within the first 50 moves. This mode is designed to help you study and understand KataGo's opening strategies, which can then be applied to your matches against people.

### What are the AI Best Move suggestions in AI KataGo Go?

When you request an AI Best Move, KataGo provides up to three candidate moves. The blue spot indicates the move KataGo considers to be the absolute best, helping you identify optimal plays.

### How does AI KataGo Go's AI Judge work?

Instead of traditional point counting, KataGo judges game strength by ownership size. Each Go space has a value between 0 and 1, indicating ownership. The AI Judge uses these values to assess the game's state and your strength.

### What is the update frequency for AI KataGo Go?

AI KataGo Go was last updated on March 26, 2026, with version 1.1.23. This suggests a development cycle that may involve periodic updates, though the exact frequency is not specified.

### What devices is AI KataGo Go available on?

AI KataGo Go is available for iPhone, iPad, and iPod. It is designed for iOS devices.

## Version history (last 5 releases)

### 2.0.4 — 2026-08-15

Added tsumego next problem auto-load setting

### 2.0.3 — 2026-07-13

New Tsumego Feature Added!
Improve your Go skills by solving over 27,000 tsumego problems.

### 2.0.2 — 2026-06-07

New Tsumego Feature Added!
Improve your Go skills by solving over 27,000 tsumego problems.

### 2.0.0 — 2026-06-04

New Tsumego Feature Added!
Improve your Go skills by solving over 27,000 tsumego problems.

### 1.2.0 — 2026-04-29

Improved stability

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## More apps by Nextio Co., Ltd.

- [StudyFriends](https://appshunter.io/ios/app/studyfriends/id6758122244)

All apps by Nextio Co., Ltd.: https://appshunter.io/developer/1560986335

## Related topics

[tsumego pro](https://appshunter.io/ios/topics/tsumego-pro)

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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 2026-08-20.*