# pi!

> pi! (iPhone/iPad app by Sijun Yang.)

- Source: https://appshunter.io/ios/app/pi/id6760577760 (this page in markdown: same URL + `.md`)
- Developer: [Sijun Yang](https://appshunter.io/developer/1819339978)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 26.0 · 4 MB
- Languages: English, Korean
- Released: 2026-03-18
- Data updated: 2026-07-09
- User reviews in markdown: https://appshunter.io/ios/app/pi/id6760577760/reviews.md

## What is 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…


## Version history (last 1 release)

### 1.0 — 2026-03-18

No release notes.

## More apps by Sijun Yang

- [March 16](https://appshunter.io/ios/app/march-16/id6756217289)
- [Crown Prix](https://appshunter.io/ios/app/crown-prix/id6758554134)

All apps by Sijun Yang: https://appshunter.io/developer/1819339978

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-09.*