# Machine Challenge vs Water Box

The clearest difference is in-app purchases: Machine Challenge at none against Water Box's 5. Machine Challenge also leads on iOS requirement (11.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Water Box sells 5 one-off in-app purchases. Machine Challenge asks for nothing beyond the download.

Machine Challenge ships an update every 10 days, Water Box every 9 days. The most recent releases landed on September 9, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Machine Challenge | Water Box |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (1.6K ratings)](https://appshunter.io/ios/app/water-box-physics-sandbox/id6741103044/reviews)** |
| Number of ratings | — | **1.6K** |
| Positive reviews | — | 92.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 95 MB | 101 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Huseyin Gulgen](https://appshunter.io/developer/1596459830) | [Lukas Oertel](https://appshunter.io/developer/1562391231) |

## What reviewers say

### Machine Challenge

[App page](https://appshunter.io/ios/app/machine-challenge/id1623578726)

**Features:** macOS Compatibility

**In-app purchases:** none


### Water Box

[App page](https://appshunter.io/ios/app/water-box-physics-sandbox/id6741103044)

Explore realistic fluid dynamics and ragdoll physics in this sandbox playground. Sink ships, experiment with various liquids, and unleash destruction with a wide array of tools and elements. Build and test your creations in a detailed simulation environment.

**Highlights:** Realistic water and powder simulation, Ragdoll people playground experiments, Ship sinking and floating simulator, Gore and destruction simulator, Alchemy, fire, and chemical reactions, Build and share creations

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Increase max water by 10000 | $2.99 | one-time |
| Creative Package 50% Discount | $4.99 | one-time |
| Increase max water by 20000 | $4.99 | one-time |
| Creative Package | $9.99 | one-time |
| Increase max water by 50000 | $9.99 | one-time |

**What reviewers like**

- 👍 Good game
- 👍 Awesome game
- 👍 Fun and good game
- 👍 Great game
- 👍 Satisfying and fun

**What reviewers complain about**

- 🐛 Crashes frequently
- 💡 Increase water capacity

**Reported bugs**

- Crashes frequently

**Requested features**

- Make ships sink like in Floating Sandbox


## Frequently asked questions

### Is Machine Challenge free?

Machine Challenge is free to download, with no in-app purchases.

### Is Water Box free?

Water Box is free to download, with in-app purchases available.

### Do Machine Challenge or Water Box have ads?

Both Machine Challenge and Water Box show ads.

### Which is updated more often, Machine Challenge or Water Box?

Machine Challenge ships an update every 10 days, and Water Box every 9 days. Most recently, Machine Challenge was updated on September 9, 2026 and Water Box on September 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.*