# Flash vs Flash Mental Math (Anzan)

The clearest difference is in-app purchases: Flash at none against Flash Mental Math (Anzan)'s 1. Flash also leads on ads (none vs shown). Flash Mental Math (Anzan)'s advantage is update cadence (weekly vs every 4 months) and iOS requirement (15.0 vs 17.0). On price 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. Flash asks for nothing beyond the download.

Flash ships an update every 4 months, Flash Mental Math (Anzan) weekly. The most recent releases landed on September 18, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Flash | 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** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 16 MB | 51 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [yeeun seo](https://appshunter.io/developer/1634215603) | [SIC Company Limited](https://appshunter.io/developer/1800842356) |

## What reviewers say

### Flash

[App page](https://appshunter.io/ios/app/flash-mental-math/id1634215601)

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

**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 Flash free?

Flash 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 Flash or Flash Mental Math (Anzan) have ads?

Flash Mental Math (Anzan) shows ads; Flash does not.

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

Flash ships an update every 4 months, and Flash Mental Math (Anzan) weekly. Most recently, Flash was updated on September 18, 2026 and Flash Mental Math (Anzan) on September 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.*