# Rectangles & Primes vs 2s Complement Calculator

The clearest difference is update cadence: Rectangles & Primes at every 3 weeks against 2s Complement Calculator's every 15 months. 2s Complement Calculator's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support 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, 2s Complement Calculator every 15 months. Both last shipped on November 7, 2026.

## The numbers

| Metric | Rectangles & Primes | 2s Complement Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 15 months |
| Size | 10 MB | 17 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Johannes Charra](https://appshunter.io/developer/1557733427) | [Ahmad Sattar](https://appshunter.io/developer/1458483953) |

## What reviewers say

### Rectangles & Primes

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 2s Complement Calculator

[App page](https://appshunter.io/ios/app/2s-complement-calculator/id1607991482)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rectangles & Primes free?

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

### Is 2s Complement Calculator free?

2s Complement Calculator is free to download, with no in-app purchases.

### Do Rectangles & Primes or 2s Complement Calculator have ads?

Neither Rectangles & Primes nor 2s Complement Calculator shows ads.

### Which is updated more often, Rectangles & Primes or 2s Complement Calculator?

Rectangles & Primes ships an update every 3 weeks, and 2s Complement Calculator every 15 months. Most recently, Rectangles & Primes was updated on November 7, 2026 and 2s Complement Calculator on November 7, 2026.

---

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