# 88くんマスター　そろばん教室88くん vs Flash mental calculation

The clearest difference is review sentiment: Flash mental calculation at 100% against 88くんマスター　そろばん教室88くん's 0%. 88くんマスター　そろばん教室88くん's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Flash mental calculation sells 1 one-off in-app purchase. 88くんマスター　そろばん教室88くん asks for nothing beyond the download.

88くんマスター　そろばん教室88くん ships an update every 3 months, Flash mental calculation every 5 months. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 88くんマスター　そろばん教室88くん | Flash mental calculation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flash-mental-calculation/id1224937523/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 28 MB | 11 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SEIHA NETWORK CO., LTD.](https://appshunter.io/developer/968260084) | [kenji kiuchi](https://appshunter.io/developer/553473005) |

## What reviewers say

### 88くんマスター　そろばん教室88くん

[App page](https://appshunter.io/ios/app/88-88/id1207740524)

This official app from Soroban Kyoshitsu 88-kun offers practice for children attending their abacus classes. It allows for flash calculation and arithmetic drills at home, with features like multiplication tables and place value exercises.

**Highlights:** Flash calculation practice, Multiplication table drills, Place value exercises, Addition and subtraction practice, Division and multiplication drills, Number recognition for toddlers

**Features:** 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 88くんマスター　そろばん教室88くん free?

88くんマスター　そろばん教室88くん is free to download, with no in-app purchases.

### Is Flash mental calculation free?

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

### Do 88くんマスター　そろばん教室88くん or Flash mental calculation have ads?

Flash mental calculation shows ads; 88くんマスター　そろばん教室88くん does not.

### Which is updated more often, 88くんマスター　そろばん教室88くん or Flash mental calculation?

88くんマスター　そろばん教室88くん ships an update every 3 months, and Flash mental calculation every 5 months. Most recently, 88くんマスター　そろばん教室88くん was updated on October 17, 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.*