# Prime Factorization Deluxe vs Rectangles & Primes

The clearest difference is price: Rectangles & Primes at Free against Prime Factorization Deluxe's $1.99. Rectangles & Primes also leads on update cadence (every 3 weeks vs every 38 months) and device support (3 vs 1). Prime Factorization Deluxe's advantage is iOS requirement (12.0 vs 15.0). On ads and in-app purchases there is nothing between them.

Rectangles & Primes is free to download; Prime Factorization Deluxe costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Prime Factorization Deluxe ships an update every 38 months, Rectangles & Primes every 3 weeks. The most recent releases landed on June 11, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Prime Factorization Deluxe | Rectangles & Primes |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/prime-factorization-deluxe/id971807388/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 15 MB | 10 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Johannes Charra](https://appshunter.io/developer/1557733427) |

## What reviewers say

### Prime Factorization Deluxe

[App page](https://appshunter.io/ios/app/prime-factorization-deluxe/id971807388)

Explore prime factorization, GCF, and LCM with an interactive factor tree. Select numbers up to 100 to build factor trees and learn mathematical concepts visually. Ideal for students learning number theory.

**Highlights:** Interactive prime factorization tool, Factor tree visualization, Greatest Common Factor (GCF) calculation, Least Common Multiple (LCM) calculation, Number selection up to 100, Visual distinction between prime and composite numbers

**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 Prime Factorization Deluxe free?

Prime Factorization Deluxe costs $1.99, with no in-app purchases.

### Is Rectangles & Primes free?

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

### Do Prime Factorization Deluxe or Rectangles & Primes have ads?

Neither Prime Factorization Deluxe nor Rectangles & Primes shows ads.

### Which is updated more often, Prime Factorization Deluxe or Rectangles & Primes?

Prime Factorization Deluxe ships an update every 38 months, and Rectangles & Primes every 3 weeks. Most recently, Prime Factorization Deluxe was updated on June 11, 2026 and Rectangles & Primes on September 15, 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.*