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

The clearest difference is review sentiment: Abacus Lesson at 100% against フラッシュ暗算（あそんでまなぶ！シリーズ）'s 60%. Abacus Lesson also leads on update cadence (every 2 weeks 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 11.0). On price, ads, in-app purchases 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 and Abacus Lesson sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

フラッシュ暗算（あそんでまなぶ！シリーズ） ships an update every 32 months, Abacus Lesson every 2 weeks. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | フラッシュ暗算（あそんでまなぶ！シリーズ） | Abacus Lesson |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (15 ratings)](https://appshunter.io/ios/app/abacus-lesson-multiplication/id1582635868/reviews)** |
| Number of ratings | — | **15** |
| Positive reviews | 60.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 32 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 138 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UNI-TY INC.](https://appshunter.io/developer/433109975) | [Hirokazu Komatsu](https://appshunter.io/developer/1523833531) |

## 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 |


### Abacus Lesson

[App page](https://appshunter.io/ios/app/abacus-lesson-multiplication/id1582635868)

Learn multiplication using a virtual abacus. This app teaches a simple and fast method for calculating multiplication, emphasizing the mental calculation benefits of the abacus over digital calculators.

**Highlights:** Virtual abacus for multiplication, Simple and fast calculation methods, Focus on mental calculation skills, Step-by-step multiplication lessons, Suitable for beginners

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation Lv1 for hiding Ad | $1.99 | one-time |
| Donation Lv2 for hiding Ad | $3.99 | one-time |
| Donation Lv3 for hiding Ad | $8.99 | one-time |


## 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 Abacus Lesson free?

Abacus Lesson is free to download, with in-app purchases available.

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

Both フラッシュ暗算（あそんでまなぶ！シリーズ） and Abacus Lesson 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 Abacus Lesson?

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 Abacus Lesson every 2 weeks. Most recently, フラッシュ暗算（あそんでまなぶ！シリーズ） was updated on November 2, 2026 and Abacus Lesson on November 7, 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.*