# NumMemorize vs Find Prime Num

NumMemorize and Find Prime Num both sit at 5.0 stars, but that hides the real split: 100% of NumMemorize's written reviews are positive against 50% of Find Prime Num's. NumMemorize also leads on iOS requirement (9.0 vs 12.0). Find Prime Num's advantage is update cadence (every 4 days vs every 4 months). On price, rating, ratings volume and ads 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 — 5.0 for NumMemorize against 5.0 for Find Prime Num. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 100% of NumMemorize's written reviews are positive against 50% of Find Prime Num's.

NumMemorize ships an update every 4 months, Find Prime Num every 4 days. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | NumMemorize | Find Prime Num |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/nummemorize/id310151986/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/find-prime-num/id1505409395/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 3 MB | 8 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mahboud Zabetian](https://appshunter.io/developer/310151989) | [Duo Pisceses, Inc.](https://appshunter.io/developer/850707063) |

## What reviewers say

### NumMemorize

[App page](https://appshunter.io/ios/app/nummemorize/id310151986)

This app helps users memorize digits of mathematical constants like pi and e through quizzes. It also allows users to input and memorize their own custom numbers, and offers voice input for convenience.

**Highlights:** Memorize digits of pi, e, and other constants, Quiz yourself on number recall, Input and memorize custom numbers, Voice input for number entry, Practice for math and science students

**Features:** macOS Compatibility

**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 NumMemorize free?

NumMemorize 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, NumMemorize or Find Prime Num?

NumMemorize and Find Prime Num are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

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

Neither NumMemorize nor Find Prime Num shows ads.

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

NumMemorize ships an update every 4 months, and Find Prime Num every 4 days. Most recently, NumMemorize was updated on September 28, 2026 and Find Prime Num on September 29, 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.*