# Prime Checker vs 瞬間素因数分解 Prime Factorization

The clearest difference is in-app purchases: Prime Checker at none against 瞬間素因数分解 Prime Factorization's 1. Prime Checker also leads on ads (none vs shown) and device support (4 vs 2). 瞬間素因数分解 Prime Factorization's advantage is update cadence (weekly vs every 17 months). On price there is nothing between them.

Both are free to download. 瞬間素因数分解 Prime Factorization sells 1 one-off in-app purchase. Prime Checker asks for nothing beyond the download.

Prime Checker ships an update every 17 months, 瞬間素因数分解 Prime Factorization weekly. The most recent releases landed on August 29, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Prime Checker | 瞬間素因数分解 Prime Factorization |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/prime-checker/id389112910/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 95.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Weekly** |
| Monetization | Free | — |
| Size | 3 MB | 3 MB |
| Requires iOS | **12.4** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Heart Solutions, Inc.](https://appshunter.io/developer/389112913) | [YUSUKE MIZUNO](https://appshunter.io/developer/1729948508) |

## What reviewers say

### Prime Checker

[App page](https://appshunter.io/ios/app/prime-checker/id389112910)

This app performs advanced mathematical calculations for numbers, including integer factorization, Euler's totient function, and solving specific Diophantine equations. It utilizes advanced algorithms for factorization and primality testing.

**Highlights:** Integer factorization, Euler's totient function, Primitive root calculation, Diophantine equation solver, Primality testing

**Features:** macOS Compatibility

**In-app purchases:** none


### 瞬間素因数分解 Prime Factorization

[App page](https://appshunter.io/ios/app/prime-factorization/id6478605149)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ad | $1.99 | one-time |


## Frequently asked questions

### Is Prime Checker free?

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

### Is 瞬間素因数分解 Prime Factorization free?

瞬間素因数分解 Prime Factorization is free to download, with in-app purchases available.

### Do Prime Checker or 瞬間素因数分解 Prime Factorization have ads?

瞬間素因数分解 Prime Factorization shows ads; Prime Checker does not.

### Which is updated more often, Prime Checker or 瞬間素因数分解 Prime Factorization?

Prime Checker ships an update every 17 months, and 瞬間素因数分解 Prime Factorization weekly. Most recently, Prime Checker was updated on August 29, 2026 and 瞬間素因数分解 Prime Factorization on September 21, 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.*