# Reef Defender vs Spear Chain

The clearest difference is ads: Reef Defender at none against Spear Chain's shown. Spear Chain's advantage is update cadence (daily vs every 54 months) and device support (3 vs 1). On price, in-app purchases 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.

Reef Defender ships an update every 54 months, Spear Chain daily. The most recent releases landed on October 3, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Reef Defender | Spear Chain |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | Every 54 months | **Daily** |
| Monetization | Free | — |
| Size | 16 MB | 135 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [State of Hawaii](https://appshunter.io/developer/1473057158) | [Ali Said Yuksel](https://appshunter.io/developer/1481717311) |

## 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


### Spear Chain

[App page](https://appshunter.io/ios/app/spear-chain/id6479698328)

**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 Spear Chain free?

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

### Do Reef Defender or Spear Chain have ads?

Spear Chain shows ads; Reef Defender does not.

### Which is updated more often, Reef Defender or Spear Chain?

Reef Defender ships an update every 54 months, and Spear Chain daily. Most recently, Reef Defender was updated on October 3, 2026 and Spear Chain on September 25, 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.*