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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Fixed a crash issue on macOS．
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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kaname Inoue
- Size
- 16.3 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.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Infrequent
Contests
- 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
- Copyright
- © 2026 K I