Go Lab
Powered by KataGo engine
$2.99 · Designed for iPad
A Go app powered by strong KataGo-based AI and a full-size board display, letting you enjoy serious games at your own pace.
This Go app features the powerful AI engine “KataGo,” supporting 9×9, 13×13, and full 19×19 boards.
Not only can you play games, but you can also view win-rate evaluation during play and analyze past moves afterward.
Everything from playing to reviewing and analyzing your games can be done in a single app.
The 19×19 board can be displayed beautifully at full-screen size, allowing you to enjoy a complete Go experience entirely on your phone.
The app supports matches against the CPU and two-player games on a single device, both completely offline, so you can play anytime, anywhere without a network connection.
Main Features
• Full-screen board display: Switch between regular view and full-screen mode with a tap. Highly recommended for 19×19 games.
• Live evaluation during games: View win-rate graphs and numerical evaluation even while playing.
• Thinking-time visualization: Each move’s thinking time is shown in the game record, with long thinking moves highlighted (top 5% in red / top 15% in yellow).
• Bad-move detection: Moves that significantly worsen the position are highlighted, helping you find review points at a glance.
• Game review tools: Step backward, forward, and autoplay to replay past games at your own pace.
• Board position jump: Tap any move in the game record to instantly jump to that point.
• Resume later: Games in progress are saved automatically so you can continue anytime.
• Adjustable CPU strength: Change difficulty levels to practice or challenge stronger AI opponents.
• Undo (take back): Undo the last move and try again when needed.
• Haptics and animations: Smooth feedback for moves and actions.
• Completely offline: Enjoy AI matches or two-player shared-device games without any network connection.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
• Made internal improvements and minor adjustments.
The developer, koji ozono, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- koji ozono
- Size
- 24.7 MB
- Category
- Board
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- ©2026 Koji Ozono
