# Find Prime Num vs Rectangles & Primes

The clearest difference is update cadence: Find Prime Num at every 4 days against Rectangles & Primes's every 3 weeks. Find Prime Num also leads on iOS requirement (12.0 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.

Find Prime Num ships an update every 4 days, Rectangles & Primes every 3 weeks. The most recent releases landed on September 10, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Find Prime Num | Rectangles & Primes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/find-prime-num/id1505409395/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | Free | — |
| Size | 8 MB | 10 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Duo Pisceses, Inc.](https://appshunter.io/developer/850707063) | [Johannes Charra](https://appshunter.io/developer/1557733427) |

## What reviewers say

### Find Prime Num

[App page](https://appshunter.io/ios/app/find-prime-num/id1505409395)

Quickly determine if a number is prime and find one of its factors. This app also measures calculation time to help you benchmark your device's processing speed. Share your results and compare performance with others.

**Highlights:** Calculate prime numbers up to 64-bit integers, Measure processing time for device speed comparison, Find one factor of a non-prime number, Share calculation results, User-friendly interface

**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 Find Prime Num free?

Find Prime Num is free to download, with no in-app purchases.

### Is Rectangles & Primes free?

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

### Do Find Prime Num or Rectangles & Primes have ads?

Neither Find Prime Num nor Rectangles & Primes shows ads.

### Which is updated more often, Find Prime Num or Rectangles & Primes?

Find Prime Num ships an update every 4 days, and Rectangles & Primes every 3 weeks. Most recently, Find Prime Num was updated on September 10, 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.*