# Rectangles & Primes — Master basic arithmetic

> Master basic arithmetic (iPhone/iPad app by Johannes Charra.)

- Source: https://appshunter.io/ios/app/rectangles-and-primes/id1572074176 (this page in markdown: same URL + `.md`)
- Developer: [Johannes Charra](https://appshunter.io/developer/1557733427)
- Category: Education, Entertainment
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 10 MB
- Languages: English
- Released: 2022-12-10
- Data updated: 2026-08-05
- User reviews in markdown: https://appshunter.io/ios/app/rectangles-and-primes/id1572074176/reviews.md

## What is Rectangles & Primes?

Rectangle provides a fun and insightful maths experience for kids aged 6 to 12. They will improve their understanding of number factorization and prime numbers.


## Version history (last 5 releases)

### 1.14 — 2026-07-30

Interne Verbesserungen, moderner Software-Stack

### 1.12 — 2024-10-28

Language selection upfront, color/styling/i18n improvements.

### 1.10 — 2024-10-07

- French language added
- Fix online score table length

### 1.9 — 2024-08-19

Improved UI, maintenance

### 1.8 — 2024-03-27

The first-time user tutorial has been improved and moved into a separate navi item.

## Apps similar to Rectangles & Primes

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Find Prime Num](https://appshunter.io/ios/app/find-prime-num/id1505409395) | 5.0 (1) | Free | Education |
| [Prime Not Prime](https://appshunter.io/ios/app/prime-not-prime/id6738664674) | 5.0 (4) | Free | Education |
| [Facterz](https://appshunter.io/ios/app/facterz/id6473190275) | — | Free | Education |
| [Prime Numbers Math Games](https://appshunter.io/ios/app/prime-numbers-math-games/id6737446154) | 3.0 (2) | Free | Education |
| [Prime Factorization Deluxe](https://appshunter.io/ios/app/prime-factorization-deluxe/id971807388) | 1.0 (1) | $1.99 | Education |
| [CheckPrimeNumbers](https://appshunter.io/ios/app/checkprimenumbers/id6670205769) | — | $0.99 | Education |

## More apps by Johannes Charra

- [Bee Notes](https://appshunter.io/ios/app/bee-notes/id1557953046)

All apps by Johannes Charra: https://appshunter.io/developer/1557733427

---

*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 2026-08-05.*