Brain Nine

Brain Nine

Free · Designed for iPad. Not verified for macOS.

Brain Nine is a clean, minimalist Sudoku for iOS, built to play anytime — online or off. FOUR DIFFICULTY LEVELS From Easy to Expert, every board is generated instantly and guarantees a unique solution. NOTES & AUTO-FILL Pencil in candidates by hand, or auto-fill every empty cell with a single tap. SMART HINTS 3 hints per game, always prioritizing the most instructive move. You can also turn on unique-candidate highlighting to sharpen your technique without spending a hint. UNLIMITED UNDO Step back as many times as you like while solving a board. TIMED MODE Turn it on for an extra challenge: every mistake adds a 30-second penalty, and you can pause anytime — the board hides itself while paused. STATS & STREAKS Best time, adjusted time, perfect games, and your current daily streak. LOCAL LEADERBOARD Compare your best times per difficulty, all stored right on your own device. THEME & ACCESSIBILITY Light, dark, or system theme, plus a palette designed specifically for color blindness. ENGLISH & SPANISH The app automatically adapts to your device's language. PLAY OFFLINE The game works entirely without an internet connection. No account or sign-in required to play. Brain Nine includes ads that help keep the app free.

Ratings & Reviews

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Fixed a bug where watching a video for an extra hint only worked the first time — you can now do it as many times as you need.

Version 1.2

The developer, Tepuy Tech Inc, 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.

    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
    Tepuy Tech Inc.
    Size
    43.7 MB
    Category
    Board
    Compatibility
    Requires iOS 18.2 or later.
    • iPhone
      Requires iOS 18.2 or later.
    • iPad
      Requires iPadOS 18.2 or later.
    • Mac
      Requires macOS 15.2 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.2 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Tepuy Tech Inc.
  • Developer Website
  • Privacy Policy

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