pi!
Sijun Yang Education iPhoneiPadiPod touchApple Watch
pi! is a free Education app for iPhone and iPad by Sijun Yang. Requires iOS 26.0. Updated March 18, 2026.
- Price
- Free
- on the App Store
- Size
- 4 MB
- Age 4+
- Updated
- Mar 18
- 2026 · v1.0
Screenshots
About 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…
App privacy
The developer, Sijun Yang, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to pi!
Looking for apps like pi!? Here are 6 similar apps on the App Store. The highest rated is Wrist Cards - Multiplication (5.0/5), and 5 of the 6 are free to download.
-
LooperSkill
-
Pi Champ
-
Wrist Cards - Multiplication
5.0
-
Numery: Major System
-
Pi Sequence: Memorize Pi
-
Timemoa - Study Timer
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| pi! | – | Free | March 18, 2026 | |
| LooperSkill | – | Free | Jul 22, 2026 | Compare |
| Pi Champ | – | Free | Mar 14, 2026 | Compare |
| Wrist Cards - Multiplication | 5.0 / 5 (1) | 0.99 USD | Aug 26, 2026 | Compare |
| Numery: Major System | – | Free | May 20, 2026 | Compare |
| Pi Sequence: Memorize Pi | – | Free | Sep 15, 2026 | Compare |
| Timemoa - Study Timer | – | Free | Oct 10, 2026 | Compare |
Compare pi! with the top alternatives: ratings, updates, ASO score and keyword gaps →