pi!
Memorize 10,000 Digits of π
Free
Master the digits of π — from your first 10 to all 10,000. Learn, test, and track your progress across iPhone, iPad, Mac, and Apple Watch.
How many digits of π can you memorize?
π Memorizer helps you learn and recall the digits of pi using a simple, focused approach: see the digits, hide them, type them back. No gimmicks — just effective memorization.
LEARN
• Study digits in customizable chunks of 5, 10, or 20
• See the digits, then hide and input them from memory
• Pick up right where you left off — progress saves automatically
• Browse all 10,000 digits with your learned positions highlighted
• Tap any group to jump to that position and start practicing
TEST
• Type digits of π from memory as fast as you can
• Timer starts on your first tap — no pressure until you're ready
• See your entered digits organized in clean, readable groups
• Wrong digit? Game over. See exactly where you went wrong and what the correct digit was
• Beat your personal record and track your improvement
STATS
• Personal best record, learning progress, current streak
• Average speed (digits per second), total sessions, and practice time
• Full session history to review past attempts
APPLE WATCH
• Quick-test on the go with a compact numpad
• Best record syncs with your iPhone via WatchConnectivity
DESIGNED FOR APPLE
• Liquid Glass design language — beautiful on iOS 26, iPadOS, and macOS
• Apple Pencil Scribble support on iPad — write digits by hand
• iCloud sync keeps your progress across all your devices
• Haptic feedback on every tap for a satisfying input experience
Whether you're a math enthusiast, a memory athlete, or just curious how far you can go — π Memorizer is your companion for the journey from 3.14 to 3.14159265358979323846…
Ratings & Reviews
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The developer, Sijun Yang, 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
- Sijun Yang
- Size
- 4.3 MB
- Category
- Education
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Apple Vision
Requires visionOS 26.0 or later. - Apple Watch
Requires watchOS 26.0 or later.
- iPhone
- Languages
- English and Korean
- Age Rating
4+
- 4+
- Copyright
- © 2026 Sijun Yang