# Prime Factors vs Prime Cracker

The clearest difference is price: Prime Cracker at Free against Prime Factors's $0.99. Prime Cracker also leads on rating (4.9 vs 3.9) and update cadence (every 2 weeks vs every 21 months). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Prime Cracker is free to download; Prime Factors costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Prime Cracker holds the better App Store score, 4.9 against 3.9. Both are backed by a comparable volume of ratings — 24 and 31 respectively. Written reviews point the same way: 79% of Prime Factors's written reviews are positive against 100% of Prime Cracker's.

Prime Factors ships an update every 21 months, Prime Cracker every 2 weeks. The most recent releases landed on September 10, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Prime Factors | Prime Cracker |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.9 (24 ratings)](https://appshunter.io/ios/app/prime-factors/id741746948/reviews) | **[4.9 (31 ratings)](https://appshunter.io/ios/app/prime-cracker/id1281280649/reviews)** |
| Number of ratings | 24 | **31** |
| Positive reviews | 78.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 1 MB | 6 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Paul Hangas](https://appshunter.io/developer/433121902) | [Sven Freitag](https://appshunter.io/developer/1281280648) |

## What reviewers say

### Prime Factors

[App page](https://appshunter.io/ios/app/prime-factors/id741746948)

Explore numbers up to one trillion, with primes clearly marked. Tap any number to reveal its prime factors. Easily navigate to specific numbers using the search function and adjust the display with pinch-to-zoom gestures.

**Highlights:** View numbers up to 1 trillion, Prime numbers highlighted, Tap for prime factors, Search for specific numbers, Pinch and zoom display

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Prime Factors free?

Prime Factors costs $0.99, with no in-app purchases.

### Is Prime Cracker free?

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

### Which has better reviews, Prime Factors or Prime Cracker?

Prime Cracker is rated higher. Prime Factors averages 3.9 out of 5 from 24 ratings, while Prime Cracker averages 4.9 from 31 ratings.

### Do Prime Factors or Prime Cracker have ads?

Neither Prime Factors nor Prime Cracker shows ads.

### Which is updated more often, Prime Factors or Prime Cracker?

Prime Factors ships an update every 21 months, and Prime Cracker every 2 weeks. Most recently, Prime Factors was updated on September 10, 2026 and Prime Cracker on September 9, 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.*