# Factors and Multiples vs Rectangles & Primes

The clearest difference is price: Rectangles & Primes at Free against Factors and Multiples's $2.99. Rectangles & Primes also leads on update cadence (every 3 weeks vs every 37 months) and device support (3 vs 1). Factors and Multiples's advantage is iOS requirement (8.0 vs 15.0). On ads and in-app purchases there is nothing between them.

Rectangles & Primes is free to download; Factors and Multiples costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Factors and Multiples ships an update every 37 months, Rectangles & Primes every 3 weeks. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Factors and Multiples | Rectangles & Primes |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 3 weeks** |
| Size | 16 MB | 10 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Red Hong](https://appshunter.io/developer/542314714) | [Johannes Charra](https://appshunter.io/developer/1557733427) |

## What reviewers say

### Factors and Multiples

[App page](https://appshunter.io/ios/app/factors-and-multiples/id909532243)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rectangles & Primes

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Factors and Multiples free?

Factors and Multiples costs $2.99, with no in-app purchases.

### Is Rectangles & Primes free?

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

### Do Factors and Multiples or Rectangles & Primes have ads?

Neither Factors and Multiples nor Rectangles & Primes shows ads.

### Which is updated more often, Factors and Multiples or Rectangles & Primes?

Factors and Multiples ships an update every 37 months, and Rectangles & Primes every 3 weeks. Most recently, Factors and Multiples was updated on October 7, 2026 and Rectangles & Primes on October 2, 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.*