# Number Memory 25 vs Memorize Prime Numbers

The clearest difference is price: Memorize Prime Numbers at Free against Number Memory 25's $0.99. Memorize Prime Numbers also leads on in-app purchases (none vs 1). Number Memory 25's advantage is rating (5.0 vs 3.0) and ads (none vs shown). On ratings volume and iOS requirement there is nothing between them.

Memorize Prime Numbers is free to download; Number Memory 25 costs $0.99 up front. Number Memory 25 sells 1 one-off in-app purchase. Memorize Prime Numbers asks for nothing beyond the download.

Number Memory 25 holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively.

Number Memory 25 ships an update every 3 weeks, Memorize Prime Numbers every 14 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Number Memory 25 | Memorize Prime Numbers |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/number-memory-25/id6448686063/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/memorize-prime-numbers/id6475699754/reviews) |
| Number of ratings | **5** | 2 |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 14 months |
| Monetization | Paid | **Ad-supported** |
| Size | 3 MB | 84 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [T&T United Inc.](https://appshunter.io/developer/468282934) | [Oscar Tsang](https://appshunter.io/developer/416987065) |

## What reviewers say

### Number Memory 25

[App page](https://appshunter.io/ios/app/number-memory-25/id6448686063)

This brain training app helps improve memory by challenging users to memorize and recall sequences of numbers. Regular, short practice sessions can enhance visual memory and cognitive skills.

**Highlights:** Memorize and recall number sequences, Visual memory training, Daily 30-second practice, Progressive difficulty, Simple, challenging gameplay

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All | Free | one-time |


### 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 Number Memory 25 free?

Number Memory 25 costs $0.99, and also offers in-app purchases.

### Is Memorize Prime Numbers free?

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

### Which has better reviews, Number Memory 25 or Memorize Prime Numbers?

Number Memory 25 is rated higher. Number Memory 25 averages 5.0 out of 5 from 5 ratings, while Memorize Prime Numbers averages 3.0 from 2 ratings.

### Do Number Memory 25 or Memorize Prime Numbers have ads?

Memorize Prime Numbers shows ads; Number Memory 25 does not.

### Which is updated more often, Number Memory 25 or Memorize Prime Numbers?

Number Memory 25 ships an update every 3 weeks, and Memorize Prime Numbers every 14 months. Most recently, Number Memory 25 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.*