# Rectangles & Primes vs Positional Encoding

The clearest difference is iOS requirement: Rectangles & Primes at 15.0 against Positional Encoding's 18.5. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rectangles & Primes ships an update every 3 weeks, Positional Encoding monthly. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Rectangles & Primes | Positional Encoding |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 10 MB | 2 MB |
| Requires iOS | **15.0** | 18.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Johannes Charra](https://appshunter.io/developer/1557733427) | [carl nohre](https://appshunter.io/developer/452344755) |

## What reviewers say

### Rectangles & Primes

[App page](https://appshunter.io/ios/app/rectangles-and-primes/id1572074176)

**Features:** macOS Compatibility

**In-app purchases:** none


### Positional Encoding

[App page](https://appshunter.io/ios/app/positional-encoding/id6749869150)

**In-app purchases:** none


## Frequently asked questions

### Is Rectangles & Primes free?

Rectangles & Primes is free to download, with no in-app purchases.

### Is Positional Encoding free?

Positional Encoding is free to download, with no in-app purchases.

### Do Rectangles & Primes or Positional Encoding have ads?

Neither Rectangles & Primes nor Positional Encoding shows ads.

### Which is updated more often, Rectangles & Primes or Positional Encoding?

Rectangles & Primes ships an update every 3 weeks, and Positional Encoding monthly. Most recently, Rectangles & Primes was updated on November 7, 2026 and Positional Encoding on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*