# Prime Cracker vs Find Prime Num

Prime Cracker and Find Prime Num both sit at 4.9 stars, but that hides the real split: 100% of Prime Cracker's written reviews are positive against 50% of Find Prime Num's. Prime Cracker also leads on ratings volume (33 vs 1) and device support (5 vs 3). Find Prime Num's advantage is update cadence (every 4 days vs every 2 weeks) and iOS requirement (12.0 vs 15.0). On price, rating, 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.

On the App Store both sit at effectively the same score — 4.9 for Prime Cracker against 5.0 for Find Prime Num. That said, the two scores are not equally well evidenced: Prime Cracker has 33 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 100% of Prime Cracker's written reviews are positive against 50% of Find Prime Num's.

Prime Cracker ships an update every 2 weeks, Find Prime Num every 4 days. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Prime Cracker | Find Prime Num |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (33 ratings)](https://appshunter.io/ios/app/prime-cracker/id1281280649/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/find-prime-num/id1505409395/reviews)** |
| Number of ratings | **33** | 1 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Free | Free |
| Size | 6 MB | 8 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sven Freitag](https://appshunter.io/developer/1281280648) | [Duo Pisceses, Inc.](https://appshunter.io/developer/850707063) |

## What reviewers say

### Prime Cracker

[App page](https://appshunter.io/ios/app/prime-cracker/id1281280649)

This app helps users explore the fascinating world of prime numbers. It allows you to check if a number is prime, find its factors, and discover nearby primes. You can also analyze ranges of numbers for primes and twin primes.

**Highlights:** Determine primality and factors, Find prime position, Explore nearby primes, Check number ranges for primes, Identify twin primes

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Prime Cracker free?

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

### Is Find Prime Num free?

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

### Which has better reviews, Prime Cracker or Find Prime Num?

Find Prime Num is rated higher. Prime Cracker averages 4.9 out of 5 from 33 ratings, while Find Prime Num averages 5.0 from 1 ratings.

### Do Prime Cracker or Find Prime Num have ads?

Neither Prime Cracker nor Find Prime Num shows ads.

### Which is updated more often, Prime Cracker or Find Prime Num?

Prime Cracker ships an update every 2 weeks, and Find Prime Num every 4 days. Most recently, Prime Cracker was updated on October 24, 2026 and Find Prime Num on October 14, 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.*