# Prime Cracker vs Memorize Prime Numbers

The clearest difference is review sentiment: Prime Cracker at 100% against Memorize Prime Numbers's 50%. Prime Cracker also leads on rating (4.9 vs 3.0) and ads (none vs shown). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Prime Cracker holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: Prime Cracker has 33 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Prime Cracker's written reviews are positive against 50% of Memorize Prime Numbers's.

Prime Cracker ships an update every 2 weeks, Memorize Prime Numbers every 14 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Prime Cracker | Memorize Prime Numbers |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (33 ratings)](https://appshunter.io/ios/app/prime-cracker/id1281280649/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/memorize-prime-numbers/id6475699754/reviews) |
| Number of ratings | **33** | 2 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 14 months |
| Monetization | **Free** | Ad-supported |
| Size | 6 MB | 84 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sven Freitag](https://appshunter.io/developer/1281280648) | [Oscar Tsang](https://appshunter.io/developer/416987065) |

## 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


### Memorize Prime Numbers

[App page](https://appshunter.io/ios/app/memorize-prime-numbers/id6475699754)

Learn to memorize hundreds of prime numbers within a week using a provided method. This app offers a unique approach to remembering these special numbers.

**Highlights:** Memorize hundreds of prime numbers, Learn a provided memorization method, Focus on prime number recall, Suitable for quick learning

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Prime Cracker free?

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

### Is Memorize Prime Numbers free?

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

### Which has better reviews, Prime Cracker or Memorize Prime Numbers?

Prime Cracker is rated higher. Prime Cracker averages 4.9 out of 5 from 33 ratings, while Memorize Prime Numbers averages 3.0 from 2 ratings.

### Do Prime Cracker or Memorize Prime Numbers have ads?

Memorize Prime Numbers shows ads; Prime Cracker does not.

### Which is updated more often, Prime Cracker or Memorize Prime Numbers?

Prime Cracker ships an update every 2 weeks, and Memorize Prime Numbers every 14 months. Most recently, Prime Cracker was updated on October 24, 2026 and Memorize Prime Numbers on October 25, 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.*