# フラッシュ暗算（あそんでまなぶ！シリーズ） vs Flash Mental Math

The clearest difference is in-app purchases: Flash Mental Math at none against フラッシュ暗算（あそんでまなぶ！シリーズ）'s 2. Flash Mental Math also leads on update cadence (every 3 months vs every 32 months). フラッシュ暗算（あそんでまなぶ！シリーズ）'s advantage is iOS requirement (9.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. フラッシュ暗算（あそんでまなぶ！シリーズ） sells 2 one-off in-app purchases. Flash Mental Math asks for nothing beyond the download.

フラッシュ暗算（あそんでまなぶ！シリーズ） ships an update every 32 months, Flash Mental Math every 3 months. The most recent releases landed on October 9, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | フラッシュ暗算（あそんでまなぶ！シリーズ） | Flash Mental Math |
| --- | --- | --- |
| 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 | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 32 months | **Every 3 months** |
| Monetization | — | Ad-supported |
| Size | 30 MB | 14 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UNI-TY INC.](https://appshunter.io/developer/433109975) | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) |

## What reviewers say

### フラッシュ暗算（あそんでまなぶ！シリーズ）

[App page](https://appshunter.io/ios/app/id1142523656)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $2.99 | one-time |
| 回数制限解除 | $2.99 | one-time |


### 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


## Frequently asked questions

### Is フラッシュ暗算（あそんでまなぶ！シリーズ） free?

フラッシュ暗算（あそんでまなぶ！シリーズ） is free to download, with in-app purchases available.

### Is Flash Mental Math free?

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

### Do フラッシュ暗算（あそんでまなぶ！シリーズ） or Flash Mental Math have ads?

Both フラッシュ暗算（あそんでまなぶ！シリーズ） and Flash Mental Math show ads.

### Which is updated more often, フラッシュ暗算（あそんでまなぶ！シリーズ） or Flash Mental Math?

フラッシュ暗算（あそんでまなぶ！シリーズ） ships an update every 32 months, and Flash Mental Math every 3 months. Most recently, フラッシュ暗算（あそんでまなぶ！シリーズ） was updated on October 9, 2026 and Flash Mental Math on September 29, 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.*