Shogi Lab: Sunfish Engine

Engine Analysis & Match

Free · In‑App Purchases · Designed for iPad

Free shogi app with strong AI. Play online or solo, review games with analysis and graphs. Save games and improve. Unlock Pro to remove ads and access more features. This is a shogi app powered by the full-featured Sunfish4 engine. With clear piece design and calm, intuitive controls, you can enjoy smooth gameplay from the opening to the endgame. It includes real-time evaluation during matches as well as game record replay and analysis features, allowing you to complete the entire flow from playing to reviewing within the app. Online matches with rankings are supported, and offline CPU matches are also available. Main Features ▪ In-Game Analysis (During Match) ・View evaluation values and graphs in real time. ▪ Thinking Time Visualization (During Match) ・Display thinking time on the move list. ・Long thinks are highlighted in red (top 5%) and yellow (top 15%). ▪ Key Move Detection (During Match / Analysis) ・Automatically highlights moves where the evaluation changes significantly. ▪ Game Record Analysis (Analysis) ・Replay, fast-forward, and rewind past games for review. ▪ Position Jump (Analysis) ・Instantly move to any position within the game record. ▪ Save & Resume (During Match) ・Pause a match and resume later. ▪ Adjustable CPU Strength (During Match) ・Set the difficulty level from practice to serious play. ▪ First/Second Move Selection (Start) ・Choose to play as Black or White. ▪ Take Back Move (During Match) ・Undo the last move. ▪ Legal Move Display (During Match) ・Show available moves to help prevent mistakes. ▪ Haptics & Animations (Controls) ・Smooth and responsive interaction. ▪ Online Multiplayer ・Supports ranked online matches. ・Offline CPU matches and local two-player mode are also available.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

• Refined the settings screen layout for better usability. • Optimized internal ad delivery systems for improved app stability. • Minor bug fixes and performance improvements.

Version 2.0.1

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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

  • Seller
    • koji ozono
  • Size
    • 81.2 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+
  • In-App Purchases
    Yes
  • Copyright
    • ©2026 Koji Ozono
  • Developer Website
  • Privacy Policy
  • License Agreement

    • More by koji ozono