# Flash Mental Math vs フラッシュ暗算練習

The clearest difference is update cadence: フラッシュ暗算練習 at every 9 days against Flash Mental Math's every 3 months. フラッシュ暗算練習 also leads on iOS requirement (13.0 vs 15.6). On price, ads, 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.

Flash Mental Math ships an update every 3 months, フラッシュ暗算練習 every 9 days. The most recent releases landed on September 29, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Flash Mental Math | フラッシュ暗算練習 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (18 ratings)](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | Ad-supported | — |
| Size | 14 MB | 28 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) | [Katsuyuki Hayashi](https://appshunter.io/developer/1597263179) |

## What reviewers say

### Flash Mental Math

[App page](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841)

Practice mental arithmetic with various difficulty levels and custom modes. This app serves as a brain training tool to enhance calculation skills.

**Highlights:** Mental arithmetic practice, Easy, normal, and difficult modes, Customizable modes, Brain training, Calculation skill improvement

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Flash Mental Math free?

Flash Mental Math is free to download, with no in-app purchases.

### 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.

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

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

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

Flash Mental Math ships an update every 3 months, and フラッシュ暗算練習 every 9 days. Most recently, Flash Mental Math was updated on September 29, 2026 and フラッシュ暗算練習 on October 9, 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.*