# Abacus Lesson vs Flash Mental Math (Anzan)

The clearest difference is update cadence: Flash Mental Math (Anzan) at every 10 days against Abacus Lesson's monthly. Abacus Lesson's advantage is iOS requirement (11.0 vs 15.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Abacus Lesson sells 3 one-off in-app purchases and Flash Mental Math (Anzan) sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Abacus Lesson against 5.0 for Flash Mental Math (Anzan). Both are backed by a comparable volume of ratings — 8 and 3 respectively.

Abacus Lesson ships an update monthly, Flash Mental Math (Anzan) every 10 days. Both last shipped on October 7, 2026.

## The numbers

| Metric | Abacus Lesson | Flash Mental Math (Anzan) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/abacus-lesson-division/id1593317741/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/flash-mental-math-anzan/id6749636736/reviews) |
| Number of ratings | **8** | 3 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 132 MB | 54 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hirokazu Komatsu](https://appshunter.io/developer/1523833531) | [SIC Company Limited](https://appshunter.io/developer/1800842356) |

## What reviewers say

### Abacus Lesson

[App page](https://appshunter.io/ios/app/abacus-lesson-division/id1593317741)

Learn the simple and fast method of division using an abacus. This app focuses on developing mental calculation skills by leveraging the abacus technique. It's recommended to master addition, subtraction, and multiplication with an abacus first.

**Highlights:** Learn abacus division techniques, Develop mental calculation skills, Focus on Soroban method, Step-by-step division instruction, Builds on addition, subtraction, multiplication

**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 |


### Flash Mental Math (Anzan)

[App page](https://appshunter.io/ios/app/flash-mental-math-anzan/id6749636736)

This app helps users of all ages improve their mental math and calculation speed. Numbers flash on screen briefly, training quick thinking and concentration. It's ideal for children preparing for abacus certification, students needing math test prep, or adults seeking brain training.

**Highlights:** Flash number display for quick thinking, Adjustable difficulty levels, Global and classroom rankings, No account registration required, Supports multiple languages, Intuitive interface for children

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |


## Frequently asked questions

### Is Abacus Lesson free?

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

### Is Flash Mental Math (Anzan) free?

Flash Mental Math (Anzan) is free to download, with in-app purchases available.

### Which has better reviews, Abacus Lesson or Flash Mental Math (Anzan)?

Abacus Lesson and Flash Mental Math (Anzan) are both rated 5.0 out of 5 on the App Store, from 8 and 3 ratings respectively.

### Do Abacus Lesson or Flash Mental Math (Anzan) have ads?

Both Abacus Lesson and Flash Mental Math (Anzan) show ads.

### Which is updated more often, Abacus Lesson or Flash Mental Math (Anzan)?

Abacus Lesson ships an update monthly, and Flash Mental Math (Anzan) every 10 days. Most recently, Abacus Lesson was updated on October 7, 2026 and Flash Mental Math (Anzan) on October 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.*