# Sandbox vs H2O Academy

The clearest difference is rating: H2O Academy at 5.0 against Sandbox's 4.4. H2O Academy also leads on in-app purchases (none vs 1) and ads (none vs shown). Sandbox's advantage is ratings volume (9.1K vs 1). On price and device support there is nothing between them.

Both are free to download. Sandbox sells 1 one-off in-app purchase. H2O Academy asks for nothing beyond the download.

H2O Academy holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Sandbox has 9.1K ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Sandbox | H2O Academy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (9.1K ratings)](https://appshunter.io/ios/app/sandbox-physics-simulator/id1563185441/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/h2o-academy/id1662161180/reviews)** |
| Number of ratings | **9.1K** | 1 |
| Positive reviews | 47.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 215 MB | 63 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tran Dinh Hung](https://appshunter.io/developer/1475879763) | [Dargan M. Frierson](https://appshunter.io/developer/1209897089) |

## What reviewers say

### Sandbox

[App page](https://appshunter.io/ios/app/sandbox-physics-simulator/id1563185441)

Explore a creative sandbox world where you can mix elements to discover their reactions and create dynamic environments. Experiment with physics, build structures, and witness exciting events like explosions and growth. New modes allow for planet destruction and life cycle simulation.

**Highlights:** Element mixing and reaction discovery, World building with plants and weather, Physics experiments (fire, explosions), Planet destruction mode, Life cycle simulation mode

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |

**What reviewers like**

- 🎨 Unique and creative concept
- 🔬 Interesting physics and chemistry experiments
- 🕹️ Fun and addictive gameplay

**What reviewers complain about**

- 🤯 Excessive and intrusive ads
- 🤖 Lack of customization and control options
- 🔍 Difficulty finding certain elements

**Reported bugs**

- Certain elements not functioning as expected
- Saved files becoming corrupted
- Inconsistent performance and stability issues

**Requested features**

- Add more elements and materials to experiment with
- Implement a pause/speed up time feature
- Introduce a sandbox mode without any ads
- Allow users to save and load custom creations


### H2O Academy

[App page](https://appshunter.io/ios/app/h2o-academy/id1662161180)

Prepare for your Level 1 Water Treatment Plant Operator exam with this app. It focuses exclusively on the math required, offering clear explanations and unlimited practice problems with hints and answers. Test your knowledge with quizzes designed for practical application.

**Highlights:** Targeted math topics for Level 1 exam, Explanations of math concepts, Step-by-step problem-solving guides, Unlimited practice problems, Hints and answers for practice, Knowledge testing quizzes

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sandbox free?

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

### Is H2O Academy free?

H2O Academy is free to download, with no in-app purchases.

### Which has better reviews, Sandbox or H2O Academy?

H2O Academy is rated higher. Sandbox averages 4.4 out of 5 from 9.1K ratings, while H2O Academy averages 5.0 from 1 ratings.

### Do Sandbox or H2O Academy have ads?

Sandbox shows ads; H2O Academy 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.*