# BUNKAI vs 素因数分解キングダム

The clearest difference is ads: 素因数分解キングダム at none against BUNKAI's shown. 素因数分解キングダム also leads on update cadence (weekly vs every 2 months). BUNKAI's advantage is iOS requirement (11.0 vs 16.0). On price, in-app purchases and device support there is nothing between them.

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

BUNKAI ships an update every 2 months, 素因数分解キングダム weekly. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | BUNKAI | 素因数分解キングダム |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/bunkai/id1518757863/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 12.5% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 114 MB | 55 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [ZERONE](https://appshunter.io/developer/1708775781) | [Yuta Matsuda](https://appshunter.io/developer/1788852960) |

## What reviewers say

### BUNKAI

[App page](https://appshunter.io/ios/app/bunkai/id1518757863)

A brain-training puzzle game where players break down numbers until they reach one. It uses prime factorization to defeat monsters, making learning math fun and engaging. Enjoy a simple yet addictive experience that boosts your calculation skills.

**Highlights:** Number decomposition puzzles, Prime factorization mechanics, Monster-battling gameplay, Calculation skill training, Simple tap controls, Addictive brain training

**Features:** macOS Compatibility

**In-app purchases:** none


### 素因数分解キングダム

[App page](https://appshunter.io/ios/app/id6740195589)

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

**In-app purchases:** none


## Frequently asked questions

### Is BUNKAI free?

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

### Is 素因数分解キングダム free?

素因数分解キングダム is free to download, with no in-app purchases.

### Do BUNKAI or 素因数分解キングダム have ads?

BUNKAI shows ads; 素因数分解キングダム does not.

### Which is updated more often, BUNKAI or 素因数分解キングダム?

BUNKAI ships an update every 2 months, and 素因数分解キングダム weekly. Most recently, BUNKAI was updated on October 24, 2026 and 素因数分解キングダム on October 14, 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.*