# HydrogenGame vs Duck's Island

The clearest difference is price: Duck's Island at Free against HydrogenGame's $2.99. HydrogenGame's advantage is in-app purchases (none vs 4) and ads (none vs shown). On device support there is nothing between them.

Duck's Island is free to download; HydrogenGame costs $2.99 up front. Duck's Island sells 4 one-off in-app purchases. HydrogenGame asks for nothing beyond the download.

HydrogenGame ships an update weekly, Duck's Island every 2 months. The most recent releases landed on October 5, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | HydrogenGame | Duck's Island |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/ducks-island/id6748527337/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 93.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 89 MB | 126 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Akihiro Kakoi](https://appshunter.io/developer/1738811085) | [new game style](https://appshunter.io/developer/524004114) |

## What reviewers say

### HydrogenGame

[App page](https://appshunter.io/ios/app/hydrogengame/id6480367458)

**Features:** macOS Compatibility

**In-app purchases:** none


### Duck's Island

[App page](https://appshunter.io/ios/app/ducks-island/id6748527337)

Engage in quick, soothing gameplay sessions with adorable ducks. Challenge wild ducks, power up your team, and decorate your island with collected rewards. Enjoy offline play and a unique duck choice system.

**Highlights:** Quick play sessions (< 5 minutes), Soothing duck animations, Offline play supported, Challenge wild ducks and bosses, Duck power-up system, Home screen decoration with miniatures

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock levels 6 and above | $1.99 | one-time |
| Expand the home | $1.99 | one-time |
| Owned widgets 99 | $1.99 | one-time |
| Four companions | $1.99 | one-time |


## Frequently asked questions

### Is HydrogenGame free?

HydrogenGame costs $2.99, with no in-app purchases.

### Is Duck's Island free?

Duck's Island is free to download, with in-app purchases available.

### Do HydrogenGame or Duck's Island have ads?

Duck's Island shows ads; HydrogenGame does not.

### Which is updated more often, HydrogenGame or Duck's Island?

HydrogenGame ships an update weekly, and Duck's Island every 2 months. Most recently, HydrogenGame was updated on October 5, 2026 and Duck's Island on October 24, 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.*