# Brain Tests vs ISUD Zero

The clearest difference is price: Brain Tests at Free against ISUD Zero's $0.99. Brain Tests also leads on iOS requirement (12.0 vs 15.0). ISUD Zero's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Brain Tests is free to download; ISUD Zero costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Brain Tests | ISUD Zero |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 8 months | — |
| Size | 134 MB | 119 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Oleksii Petrochenko](https://appshunter.io/developer/1669228110) | [Suwitcha Sugthana](https://appshunter.io/developer/372726303) |

## What reviewers say

### Brain Tests

[App page](https://appshunter.io/ios/app/brain-tests/id1670490664)

**Features:** macOS Compatibility

**In-app purchases:** none


### ISUD Zero

[App page](https://appshunter.io/ios/app/isud-zero/id6765926399)

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

**In-app purchases:** none


## Frequently asked questions

### Is Brain Tests free?

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

### Is ISUD Zero free?

ISUD Zero costs $0.99, with no in-app purchases.

### Do Brain Tests or ISUD Zero have ads?

Brain Tests shows ads; ISUD Zero does not.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*