pi!

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… Show More