# Spirolaterals

> Spirolaterals (iPhone/iPad app by Daniel Ethier.)

- Source: https://appshunter.io/ios/app/spirolaterals/id791250763 (this page in markdown: same URL + `.md`)
- Developer: [Daniel Ethier](https://appshunter.io/developer/432436572)
- Category: Education, Entertainment
- Price: Free
- Age rating: 4+
- Requires: iOS 11.0 · 4 MB
- Languages: American English
- Released: 2014-01-10
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/spirolaterals/id791250763/reviews.md

## What is Spirolaterals?

Spirolaterals allows you to explore geometric line designs based on applying a simple rule to a number sequence. Be warned though: spirolaterals can be very addictive!

You can create your own spirolaterals by entering a number or text like your name. Or you can explore the gallery of 80 spirolaterals by tapping Surprise Me!

Spirolaterals raise many interesting questions: Which ones repeat and why? What kinds of symmetry are present? What happens when you use a palindrome or when your numbers increase or decrease by the same amount?

I have used Spirolaterals in my math classes for many years, and students always find them fascinating. They try their name or phone number. They try to create some particular pattern. This year some students spent hours trying to create a 4x4 grid!

If you create an interesting spirolateral, email me and I may include it in the Surprise Me! gallery in a future version, with full credit to you!


## Version history (last 5 releases)

### 3.2 — 2026-01-18

Bug fixes

### 3.1 — 2022-04-08

Some small user interface improvements to provide more room for the Spirolaterals.

### 3.0 — 2022-03-30

Updated user interface to make the app easier to use.

### 2.6 — 2019-02-26

More bug fixes.

### 2.5 — 2019-02-21

Bug fixes.

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## More apps by Daniel Ethier

- [Gradekeeper for iPad](https://appshunter.io/ios/app/gradekeeper-for-ipad/id432436569)
- [Cushion Caroms](https://appshunter.io/ios/app/cushion-caroms/id955096193)
- [Gradekeeper for iPhone](https://appshunter.io/ios/app/gradekeeper-for-iphone/id1014045133)

All apps by Daniel Ethier: https://appshunter.io/developer/432436572

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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 2026-05-17.*