# フラッシュ暗算検定模試（協会） vs Flash mental calculation

The clearest difference is review sentiment: Flash mental calculation at 100% against フラッシュ暗算検定模試（協会）'s 0%. Flash mental calculation also leads on price (Free vs $3.99) and rating (5.0 vs 3.0). フラッシュ暗算検定模試（協会）'s advantage is in-app purchases (none vs 1) and ads (none vs shown). On ratings volume and device support there is nothing between them.

Flash mental calculation is free to download; フラッシュ暗算検定模試（協会） costs $3.99 up front. Flash mental calculation sells 1 one-off in-app purchase. フラッシュ暗算検定模試（協会） asks for nothing beyond the download.

Flash mental calculation holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 0% of フラッシュ暗算検定模試（協会）'s written reviews are positive against 100% of Flash mental calculation's.

フラッシュ暗算検定模試（協会） ships an update every 28 months, Flash mental calculation every 5 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | フラッシュ暗算検定模試（協会） | Flash mental calculation |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/id879920206/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flash-mental-calculation/id1224937523/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 28 months | **Every 5 months** |
| Monetization | — | Free with in-app purchases |
| Size | 15 MB | 11 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [Yuji Miyamoto](https://appshunter.io/developer/417390646) | [kenji kiuchi](https://appshunter.io/developer/553473005) |

## What reviewers say

### フラッシュ暗算検定模試（協会）

[App page](https://appshunter.io/ios/app/id879920206)

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

**In-app purchases:** none


### Flash mental calculation

[App page](https://appshunter.io/ios/app/flash-mental-calculation/id1224937523)

Practice mental arithmetic with this educational app. Review your calculation process, and easily re-challenge mistaken problems from your past logs. Upgrade to save more calculation history.

**Highlights:** Practice flash mental arithmetic, Review calculation process, Rechallenge mistaken problems, Save past calculation logs, Log history saved after purchase

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove AD & All function Release. | $9.99 | one-time |


## Frequently asked questions

### Is フラッシュ暗算検定模試（協会） free?

フラッシュ暗算検定模試（協会） costs $3.99, with no in-app purchases.

### Is Flash mental calculation free?

Flash mental calculation is free to download, with in-app purchases available.

### Which has better reviews, フラッシュ暗算検定模試（協会） or Flash mental calculation?

Flash mental calculation is rated higher. フラッシュ暗算検定模試（協会） averages 3.0 out of 5 from 2 ratings, while Flash mental calculation averages 5.0 from 2 ratings.

### Do フラッシュ暗算検定模試（協会） or Flash mental calculation have ads?

Flash mental calculation shows ads; フラッシュ暗算検定模試（協会） does not.

### Which is updated more often, フラッシュ暗算検定模試（協会） or Flash mental calculation?

フラッシュ暗算検定模試（協会） ships an update every 28 months, and Flash mental calculation every 5 months. Most recently, フラッシュ暗算検定模試（協会） was updated on October 29, 2026 and Flash mental calculation on October 24, 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.*