# PiChart — Explore π via animated lines

> Explore π via animated lines (iPhone/iPad app by Wai Cheong Yip.)

- Source: https://appshunter.io/ios/app/pichart/id6768114361 (this page in markdown: same URL + `.md`)
- Developer: [Wai Cheong Yip](https://appshunter.io/developer/419302057)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 26.2 · 14 MB
- Languages: American English
- Released: 2026-05-13
- Data updated: 2026-05-15
- User reviews in markdown: https://appshunter.io/ios/app/pichart/id6768114361/reviews.md

## What is PiChart?

PiChart turns the digits of π into a beautiful animated circular chart, helping you explore mathematics through pattern, motion, and visual curiosity.

Place the digits 0–9 around a circle, then follow the digits of π one by one. For every pair of consecutive digits, PiChart draws a line from one number to the next. As more digits are added, a colourful woven pattern begins to appear.

Whether you are a student, teacher, maths enthusiast, or simply someone who enjoys visual patterns, PiChart offers a calm and interactive way to explore one of the most famous constants in mathematics.

Main features:

• Visualise the digits of π as circular chord patterns
• Animate the drawing process with Play and Pause
• Step through digits manually for closer observation
• Adjust playback speed from slow to fast
• Choose how many lines / digits to display
• Show or hide number ticks around the circle
• Copy the currently displayed digits
• Simple, elegant dark interface designed for focus
• Works fully on-device with no account required

PiChart is designed as an educational and creative maths visualisation tool. It does not require sign-in, does not use location, and does not collect personal data.


## Version history (last 1 release)

### 1.0 — 2026-05-13

No release notes.

## More apps by Wai Cheong Yip

- [HCF&LCM](https://appshunter.io/ios/app/hcf-and-lcm/id6757761583)
- [iTStopWatch](https://appshunter.io/ios/app/itstopwatch/id6764113170)

All apps by Wai Cheong Yip: https://appshunter.io/developer/419302057

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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 2026-05-15.*