# Anzan19x19 vs Flash Mental Math (Anzan)

The clearest difference is in-app purchases: Anzan19x19 at none against Flash Mental Math (Anzan)'s 1. Anzan19x19 also leads on update cadence (every 3 days vs every 10 days) and iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Flash Mental Math (Anzan) sells 1 in-app purchase, starting at $0.99 per month. Anzan19x19 asks for nothing beyond the download.

Anzan19x19 ships an update every 3 days, Flash Mental Math (Anzan) every 10 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Anzan19x19 | Flash Mental Math (Anzan) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/flash-mental-math-anzan/id6749636736/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 10 days |
| Monetization | — | Free with in-app purchases |
| Size | 38 MB | 54 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hajime Hotaka](https://appshunter.io/developer/1495063369) | [SIC Company Limited](https://appshunter.io/developer/1800842356) |

## What reviewers say

### Anzan19x19

[App page](https://appshunter.io/ios/app/anzan19x19/id1495063370)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Anzan19x19 free?

Anzan19x19 is free to download, with no in-app purchases.

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

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

### Do Anzan19x19 or Flash Mental Math (Anzan) have ads?

Both Anzan19x19 and Flash Mental Math (Anzan) show ads.

### Which is updated more often, Anzan19x19 or Flash Mental Math (Anzan)?

Anzan19x19 ships an update every 3 days, and Flash Mental Math (Anzan) every 10 days. Most recently, Anzan19x19 was updated on October 25, 2026 and Flash Mental Math (Anzan) on October 31, 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.*