# Random Zombie Defense vs Big Brain, Small Brain

The clearest difference is in-app purchases: Big Brain, Small Brain at none against Random Zombie Defense's 10. Big Brain, Small Brain also leads on ads (none vs shown) and iOS requirement (11.0 vs 13.0). On price and device support there is nothing between them.

Both are free to download. Random Zombie Defense sells 10 one-off in-app purchases. Big Brain, Small Brain asks for nothing beyond the download.

## The numbers

| Metric | Random Zombie Defense | Big Brain, Small Brain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 days | — |
| Size | 372 MB | 128 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Yu Gyeom Kim](https://appshunter.io/developer/1766715281) | [saas ai ltd](https://appshunter.io/developer/1686810267) |

## What reviewers say

### Random Zombie Defense

[App page](https://appshunter.io/ios/app/random-zombie-defense/id6739567560)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gem 120 | $0.49 | one-time |
| 티켓 패키지 | $0.49 | one-time |
| 에너지 패키지 | $2.99 | one-time |
| Gems 600 | $3.99 | one-time |
| 열쇠 패키지 | $4.99 | one-time |
| 광고 제거 | $9.99 | one-time |
| Gem 1800 | $12.99 | one-time |
| Gem 3600 | $29.99 | one-time |
| VIP Plan | $29.99 | one-time |
| Gem 12000 | $99.99 | one-time |


### Big Brain, Small Brain

[App page](https://appshunter.io/ios/app/big-brain-small-brain/id6743080421)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Random Zombie Defense free?

Random Zombie Defense is free to download, with in-app purchases available.

### Is Big Brain, Small Brain free?

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

### Do Random Zombie Defense or Big Brain, Small Brain have ads?

Random Zombie Defense shows ads; Big Brain, Small Brain does not.

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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.*