# Go Lab: AI Baduk KataGo Engine — Online Match & AI Analysis

> AI-powered Go game with online play, analysis, and leaderboards. (iPhone/iPad app by koji ozono.)

- Source: https://appshunter.io/ios/app/go-lab-ai-baduk-katago-engine/id6757245003 (this page in markdown: same URL + `.md`)
- Developer: [koji ozono](https://appshunter.io/developer/1826482515)
- Category: Games, Board, Strategy
- Price: $3.99
- Age rating: 4+
- Requires: iOS 17.6 · 32 MB
- Languages: American English, Japanese
- Released: 2026-01-01
- Data updated: 2026-08-31
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/go-lab-ai-baduk-katago-engine/id6757245003/reviews.md

## What is Go Lab?

Experience Go like never before with the powerful AI "KataGo," now featuring highly anticipated Online Matches and Victory Leaderboards!
Supporting 9x9, 13x13, and 19x19 boards, this comprehensive Go app allows you to play, review, and analyze your games all in one place. Whether you are battling world-class AI or testing your skills against players worldwide, our beautiful interface makes every move a pleasure.
Enjoy a serious match on the go—CPU and local 2-player modes are fully supported offline, so you can focus on your game anytime, anywhere, without worrying about your connection.

Key Features
- Online Matches (NEW): Challenge players from around the world in real-time.
- Victory Leaderboards (NEW): View rankings based on your total number of wins.
- Territory Prediction Display (NEW): View KataGo's real-time territory prediction directly on the board. Toggle it on/off using the map icon in the toolbar.
- Score Graph Breakdown (NEW): The score graph's numeric display now shows a breakdown of black and white territory (e.g., "〇14 / ●9 / +5.4"), updating in real time with every move.
- Fullscreen Support: In addition to standard views, play on a beautiful, edge-to-edge board(ideal for 19x19 games).
- Real-time Analysis: Monitor win-rate graphs and score evaluations even during an active match.
- Candidate Move Display (NEW): View KataGo's top 5 candidate moves in real time, complete with win rate and score predictions. Feel the meaning behind every move.
- Think Time Visualization: See exactly how much time was spent on each move. Long-thinking periods are highlighted in Red (top 5%) and Yellow (top 15%).
- Review Guidance: Moves that significantly impacted your position are highlighted with a red background, helping you pinpoint mistakes instantly.
- Match History Analysis: Study past games with intuitive controls: replay, step back, or move forward.
- SGF Import: Import external game records by selecting a file or pasting SGF text, and add them to your match history.
- Instant Move Jump: Tap any move in the record to jump directly to that specific board position.
- Save & Resume: Games are automatically saved, allowing you to pick up exactly where you left off.
- Adjustable CPU Strength: Levels range from beginner-friendly practice to professional-grade challenges.
- UNDO: Easily take back your last move to try a different strategy.
- Haptics & Animations: Fine-tuned tactile feedback and smooth visual transitions for a premium feel.
- Complete Offline Support: CPU matches and local 2-player shared-screen modes work perfectly without an internet connection.
*Note: The in-app interface is primarily in English.

Official Website:
https://apps.vlabos.com/go/

## Key features

- Online Matches
- Victory Leaderboards
- Territory Prediction Display
- Real-time Analysis
- Candidate Move Display
- Offline CPU and 2-player modes
- SGF Import

## Chart rankings

- #200 in Top Paid · Board (US App Store)

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/go-lab-ai-baduk-katago-engine/id6757245003/reviews.md

### 5/5 — 기능 추가 요청

*2026-06-08*

실시간 형세 판단 집계산과 영역계산 등 
기능 추가 요청해요
그럼 더 좋은 바둑앱이 될꺼에요

**Developer response:** 리뷰 감사합니다. 말씀해주신 기능을 반영하여, 형세 판단 그래프에 흑집・백집 내역 표시를 추가하고, 바둑판 위에 영역(집) 예상을 실시간으로 표시하는 기능을 새 업데이트에 반영했습니다. 좋은 의견 덕분에 더 나은 앱이 되었습니다. 감사합니다.

### 3/5 — 白も黒も持ちたい

*2026-06-04*

対CPUでも対人でも、白を持つか黒を持つかを選べるようにして欲しいです。

**Developer response:** ご要望ありがとうございます！
CPU対戦で対局前に黒番・白番を選べる機能を次のアップデートで対応予定です。分析機能でも候補手が表示されるようになりますので、よろしければお楽しみに！
（対人対戦は最初に石を置いた方が黒番となる仕様としており、番色選択は対応していません。）
どうぞよろしくお願いいたします。

## Frequently asked questions about Go Lab

### What is Go Lab?

Go Lab is a mobile application designed for playing, reviewing, and analyzing games of Go. It features the powerful KataGo AI engine and offers online matches, leaderboards, and detailed game analysis tools.

### Does Go Lab support offline play?

Yes, Go Lab fully supports offline play for CPU matches and local 2-player modes. You can focus on your game anytime, anywhere, without needing an internet connection.

### What board sizes does Go Lab support?

Go Lab supports 9x9, 13x13, and 19x19 board sizes, catering to players of all skill levels and preferences.

### Can I import games into Go Lab?

Yes, you can import external game records into Go Lab by selecting an SGF file or pasting SGF text. These imported games can then be added to your match history for review.

### How does the AI analysis work in Go Lab?

Go Lab provides real-time analysis, including win-rate graphs, score evaluations, territory prediction, and candidate move displays. It also highlights moves that significantly impacted your position to help pinpoint mistakes.

### Is Go Lab available on multiple devices?

Go Lab is available for iPhone and iPad, offering a consistent experience across Apple's mobile platforms.

### How often is Go Lab updated?

The latest version of Go Lab is 1.2.0, which was last updated on June 25, 2026. Updates typically bring new features and improvements to the application.

### What is the price of Go Lab?

Go Lab is a paid application and costs $3.99. There are no in-app purchases or subscriptions required to access its full features.

## Version history (last 5 releases)

### 1.2.0 — 2026-06-25

What's New
- Territory Prediction Display: KataGo's territory prediction can now be displayed in real time directly on the board. Toggle it on/off using the map icon in the toolbar.
- Score Graph Breakdown: The score graph's numeric display now shows a breakdown of black and white territory (e.g., "〇14 / ●9 / +5.4"), updating in real time with every move.

### 1.1.3 — 2026-06-05

- Sie können jetzt die Steinfarbe (schwarz oder weiß) in CPU-Partien auswählen.
- Kandidatenzüge (Gewinnraten und Vorsprünge) können jetzt auch im Analysemodus angezeigt werden.
- Kleinere Fehlerbehebungen und weitere Verbesserungen.

### 1.1.2 — 2026-05-28

- KataGo move suggestions are now available. You can view the top 5 moves in real-time with win rate and score prediction.

### 1.1.1 — 2026-05-19

- Added the official website URL to the description.

### 1.1.0 — 2026-05-11

- Added SGF import: load game records by selecting a file or pasting SGF text
- Improved replay controls visibility in fullscreen mode

## More apps by koji ozono

- [WhisperDirect:AI Meeting Notes](https://appshunter.io/ios/app/whisperdirectai-meeting-notes/id6748595475)
- [WhisText](https://appshunter.io/ios/app/whistext/id6754094086)
- [Gomoku: Zen Five in a Row](https://appshunter.io/ios/app/gomoku-zen-five-in-a-row/id6756268340)
- [Reversi Simple:Satisfying Flip](https://appshunter.io/ios/app/reversi-simplesatisfying-flip/id6757232677)
- [Chess Lab: Arasan AI Engine](https://appshunter.io/ios/app/chess-lab-arasan-ai-engine/id6757245101)

All apps by koji ozono: https://appshunter.io/developer/1826482515

---

*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 2026-08-31.*