Constant Challenge

π & e Challenge — Pi & Euler —

Free · In‑App Purchases · Designed for iPad

Train your memory with π, e, and more through fun and challenging game modes. Constant Challenge is a training app designed to help you memorize mathematical constants like π (pi) and e while testing your skills through various challenge modes. Each constant offers the same set of game modes, allowing you to practice, compete, and improve your memory and speed. Features: - Practice Mode: Learn and memorize digits at your own pace - Time Attack Mode: Enter as many correct digits as possible within a time limit - Stage Mode: Progress through structured levels of increasing difficulty - Local Battle Mode: Competitive play possible Track your performance, challenge yourself, and aim for high scores. Perfect for students, math enthusiasts, and anyone who enjoys memory challenges. Note: This app focuses on memorization and training of mathematical constants.

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• Added haptic feedback when tapping the keyboard. • Added separate settings to enable or disable keyboard click sounds and haptic feedback. • Improved feedback during keyboard interactions. • Added support for entering numbers using a physical keyboard on Mac. • Added a guide showing the keyboard controls on Mac. • Made other improvements to stability and usability.

Version 1.0.3

The developer, Kaname Inoue, 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
    Kaname Inoue
    Size
    16.4 MB
    Category
    Games
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • iPad
      Requires iPadOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    Languages
    English and Japanese
    Age Rating
    4+
    In-App Purchases
    Yes
    • Unlock the Euler–Mascheroni (γ) $0.99
    • Unlock the Golden Ratio (φ) $0.99
    • Unlock the Square Root of 2 (√2) $0.99
    • Learn More
    Copyright
    © 2026 K I
  • Privacy Policy

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