# Flash vs OptiBrain UCMAS Practice

The clearest difference is ads: OptiBrain UCMAS Practice at none against Flash's shown. OptiBrain UCMAS Practice also leads on update cadence (weekly vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Flash ships an update every 3 months, OptiBrain UCMAS Practice weekly. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Flash | OptiBrain UCMAS Practice |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Weekly** |
| Size | 29 MB | 83 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [yeeun seo](https://appshunter.io/developer/1634215603) | [Justin Daludado](https://appshunter.io/developer/1779347505) |

## 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


### OptiBrain UCMAS Practice

[App page](https://appshunter.io/ios/app/optibrain-ucmas-practice/id6778267561)

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

**In-app purchases:** none


## Frequently asked questions

### Is Flash free?

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

### Is OptiBrain UCMAS Practice free?

OptiBrain UCMAS Practice is free to download, with no in-app purchases.

### Do Flash or OptiBrain UCMAS Practice have ads?

Flash shows ads; OptiBrain UCMAS Practice does not.

### Which is updated more often, Flash or OptiBrain UCMAS Practice?

Flash ships an update every 3 months, and OptiBrain UCMAS Practice weekly. Most recently, Flash was updated on October 5, 2026 and OptiBrain UCMAS Practice on October 3, 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.*