# 素因数分解クイズ vs Prime Nerd

素因数分解クイズ and Prime Nerd are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

素因数分解クイズ ships an update every 5 days, Prime Nerd every 3 days. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 素因数分解クイズ | Prime Nerd |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | — | Ad-supported |
| Size | 26 MB | 50 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YUKI WATANABE](https://appshunter.io/developer/1724288537) | [Hiroki Sekimoto](https://appshunter.io/developer/1877884860) |

## What reviewers say

### 素因数分解クイズ

[App page](https://appshunter.io/ios/app/1/id6740989986)

**Features:** macOS Compatibility

**In-app purchases:** none


### Prime Nerd

[App page](https://appshunter.io/ios/app/prime-nerd/id6760544446)

Tap prime numbers as they float across the screen within a time limit. This speed math game offers multiple difficulty levels, a combo system for score multipliers, and a training mode to hone your skills. Compete globally on the leaderboard and customize your challenge with digit selection.

**Highlights:** Identify prime numbers, Timed challenges, Global leaderboard, Multiple difficulty levels, Combo score multiplier, Training mode, Dark/Light theme

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

**In-app purchases:** none


## Frequently asked questions

### Is 素因数分解クイズ free?

素因数分解クイズ is free to download, with no in-app purchases.

### Is Prime Nerd free?

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

### Do 素因数分解クイズ or Prime Nerd have ads?

Both 素因数分解クイズ and Prime Nerd show ads.

### Which is updated more often, 素因数分解クイズ or Prime Nerd?

素因数分解クイズ ships an update every 5 days, and Prime Nerd every 3 days. Most recently, 素因数分解クイズ was updated on October 6, 2026 and Prime Nerd on October 11, 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.*