# SOINSU math puzzle vs 藤原氏集め

The clearest difference is in-app purchases: 藤原氏集め at none against SOINSU math puzzle's 2. 藤原氏集め also leads on review sentiment (100% vs 90%). SOINSU math puzzle's advantage is update cadence (weekly vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SOINSU math puzzle sells 2 one-off in-app purchases. 藤原氏集め asks for nothing beyond the download.

SOINSU math puzzle ships an update weekly, 藤原氏集め every 2 weeks. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | SOINSU math puzzle | 藤原氏集め |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 90.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 105 MB | 214 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GAIBAKO co., Ltd.](https://appshunter.io/developer/1548482925) | [Sumie Watanabe](https://appshunter.io/developer/1349237972) |

## What reviewers say

### SOINSU math puzzle

[App page](https://appshunter.io/ios/app/soinsu-math-puzzle/id6444055103)

Engage in a brain-training puzzle game focused on prime factorization. Anyone can learn the fun of numbers through this simple, time-killing activity. Enjoy the challenge of dividing numbers into prime factors with a high-tempo soundtrack.

**Highlights:** Prime factorization gameplay, Brain training puzzles, Mental arithmetic practice, Cyber visuals, Trance music soundtrack, Multiple game modes, Prime number collection

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add no time limit mode | $0.99 | one-time |
| Hidden Ads | $2.99 | one-time |


### 藤原氏集め

[App page](https://appshunter.io/ios/app/id6476118267)

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

**In-app purchases:** none


## Frequently asked questions

### Is SOINSU math puzzle free?

SOINSU math puzzle is free to download, with in-app purchases available.

### Is 藤原氏集め free?

藤原氏集め is free to download, with no in-app purchases.

### Do SOINSU math puzzle or 藤原氏集め have ads?

Both SOINSU math puzzle and 藤原氏集め show ads.

### Which is updated more often, SOINSU math puzzle or 藤原氏集め?

SOINSU math puzzle ships an update weekly, and 藤原氏集め every 2 weeks. Most recently, SOINSU math puzzle was updated on October 17, 2026 and 藤原氏集め on October 16, 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.*