# Reef Defender vs Happy Penguins 3D

The clearest difference is device support: Happy Penguins 3D at 3 against Reef Defender's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Reef Defender ships an update every 54 months, Happy Penguins 3D every 43 months. The most recent releases landed on October 24, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Reef Defender | Happy Penguins 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/reef-defender/id657761952/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 54 months | **Every 43 months** |
| Monetization | Free | — |
| Size | 16 MB | 77 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [State of Hawaii](https://appshunter.io/developer/1473057158) | [PAMPAM, TOV](https://appshunter.io/developer/1435908728) |

## What reviewers say

### Reef Defender

[App page](https://appshunter.io/ios/app/reef-defender/id657761952)

Explore the connection between land and sea through an engaging game inspired by ancient Hawaiian stewardship practices. Play as a shark and learn how actions on land impact the ocean ecosystem.

**Highlights:** Learn land-sea connection, Ancient Hawaiian stewardship concepts, Play as a shark, Educational gameplay, Ocean ecosystem focus

**Features:** macOS Compatibility

**In-app purchases:** none


### Happy Penguins 3D

[App page](https://appshunter.io/ios/app/happy-penguins-3d/id1508310564)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Reef Defender free?

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

### Is Happy Penguins 3D free?

Happy Penguins 3D is free to download, with no in-app purchases.

### Do Reef Defender or Happy Penguins 3D have ads?

Neither Reef Defender nor Happy Penguins 3D shows ads.

### Which is updated more often, Reef Defender or Happy Penguins 3D?

Reef Defender ships an update every 54 months, and Happy Penguins 3D every 43 months. Most recently, Reef Defender was updated on October 24, 2026 and Happy Penguins 3D on September 14, 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.*