# フラッシュ暗算練習 vs Flash Mental Math (Anzan)

The clearest difference is in-app purchases: フラッシュ暗算練習 at none against Flash Mental Math (Anzan)'s 1. フラッシュ暗算練習 also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Flash Mental Math (Anzan) sells 1 in-app purchase, starting at $0.99 per month. フラッシュ暗算練習 asks for nothing beyond the download.

フラッシュ暗算練習 ships an update every 9 days, Flash Mental Math (Anzan) every 10 days. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | フラッシュ暗算練習 | Flash Mental Math (Anzan) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/flash-mental-math-anzan/id6749636736/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 10 days |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 54 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Katsuyuki Hayashi](https://appshunter.io/developer/1597263179) | [SIC Company Limited](https://appshunter.io/developer/1800842356) |

## What reviewers say

### フラッシュ暗算練習

[App page](https://appshunter.io/ios/app/id6477322637)

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

**In-app purchases:** none


### Flash Mental Math (Anzan)

[App page](https://appshunter.io/ios/app/flash-mental-math-anzan/id6749636736)

This app helps users of all ages improve their mental math and calculation speed. Numbers flash on screen briefly, training quick thinking and concentration. It's ideal for children preparing for abacus certification, students needing math test prep, or adults seeking brain training.

**Highlights:** Flash number display for quick thinking, Adjustable difficulty levels, Global and classroom rankings, No account registration required, Supports multiple languages, Intuitive interface for children

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |


## Frequently asked questions

### Is フラッシュ暗算練習 free?

フラッシュ暗算練習 is free to download, with no in-app purchases.

### Is Flash Mental Math (Anzan) free?

Flash Mental Math (Anzan) is free to download, with in-app purchases available.

### Do フラッシュ暗算練習 or Flash Mental Math (Anzan) have ads?

Both フラッシュ暗算練習 and Flash Mental Math (Anzan) show ads.

### Which is updated more often, フラッシュ暗算練習 or Flash Mental Math (Anzan)?

フラッシュ暗算練習 ships an update every 9 days, and Flash Mental Math (Anzan) every 10 days. Most recently, フラッシュ暗算練習 was updated on October 9, 2026 and Flash Mental Math (Anzan) on October 7, 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.*