# Flash mental calculation vs そろばん暗算の計算なら そろばんDANQ

The clearest difference is rating: Flash mental calculation at 5.0 against そろばん暗算の計算なら そろばんDANQ's 3.0. そろばん暗算の計算なら そろばんDANQ's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. Flash mental calculation sells 1 one-off in-app purchase. そろばん暗算の計算なら そろばんDANQ 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 1 respectively.

Flash mental calculation ships an update every 5 months, そろばん暗算の計算なら そろばんDANQ monthly. The most recent releases landed on August 19, 2026 and July 5, 2026 respectively.

## The numbers

| Metric | Flash mental calculation | そろばん暗算の計算なら そろばんDANQ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flash-mental-calculation/id1224937523/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/danq/id1477001457/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 11 MB | 74 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kenji kiuchi](https://appshunter.io/developer/553473005) | [Oriens, Inc.](https://appshunter.io/developer/1477001456) |

## What reviewers say

### 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 |


### そろばん暗算の計算なら そろばんDANQ

[App page](https://appshunter.io/ios/app/danq/id1477001457)

This app is designed for serious practice of abacus calculation and mental abacus. It offers automatic scoring and re-presents incorrect problems for efficient learning. Practice with problems used by over 100 million people, covering all levels from beginner to advanced.

**Highlights:** Abacus calculation practice, Mental abacus training, Automatic scoring, Adaptive problem re-presentation, Progress visualization with graphs, Problems from a leading Japanese publisher

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flash mental calculation free?

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

### Is そろばん暗算の計算なら そろばんDANQ free?

そろばん暗算の計算なら そろばんDANQ is free to download, with no in-app purchases.

### Which has better reviews, Flash mental calculation or そろばん暗算の計算なら そろばんDANQ?

Flash mental calculation is rated higher. Flash mental calculation averages 5.0 out of 5 from 2 ratings, while そろばん暗算の計算なら そろばんDANQ averages 3.0 from 1 ratings.

### Do Flash mental calculation or そろばん暗算の計算なら そろばんDANQ have ads?

Flash mental calculation shows ads; そろばん暗算の計算なら そろばんDANQ does not.

### Which is updated more often, Flash mental calculation or そろばん暗算の計算なら そろばんDANQ?

Flash mental calculation ships an update every 5 months, and そろばん暗算の計算なら そろばんDANQ monthly. Most recently, Flash mental calculation was updated on August 19, 2026 and そろばん暗算の計算なら そろばんDANQ on July 5, 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.*