# Grav Box vs Water Simulator

The clearest difference is review sentiment: Grav Box at 96% against Water Simulator's 0%. Grav Box also leads on rating (4.8 vs 3.0) and ratings volume (26 vs 2). Water Simulator's advantage is ads (none vs shown) and update cadence (every 5 days vs every 5 months). On price, in-app purchases and monetization model there is nothing between them.

Both are free to download. Grav Box sells 10 one-off in-app purchases and Water Simulator sells 3 in-app purchases, starting at $0.29 per 7 days. Whichever you choose, the download price is not the number that matters.

Grav Box holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Grav Box has 26 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 96% of Grav Box's written reviews are positive against 0% of Water Simulator's.

Grav Box ships an update every 5 months, Water Simulator every 5 days. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Grav Box | Water Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (26 ratings)](https://appshunter.io/ios/app/grav-box/id1050320618/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/water-simulator-fluid-physics/id6757202722/reviews) |
| Number of ratings | **26** | 2 |
| Positive reviews | **96.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 8 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gianluca Capraro](https://appshunter.io/developer/1691787728) | [Adam Doherty](https://appshunter.io/developer/1838643162) |

## What reviewers say

### Grav Box

[App page](https://appshunter.io/ios/app/grav-box/id1050320618)

Control gravity with a tap and hold to manipulate objects. Customize their appearance, explore dynamic physics, and engage in arcade challenges with leaderboards and achievements.

**Highlights:** Tap and hold to control gravity, Customize grav colors and emojis, Dynamic backgrounds and physics effects, Arcade mode with achievements, Global leaderboards, In-game events like black holes

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gold Blocks (100) Pack | $0.99 | one-time |
| Light Portal | $0.99 | one-time |
| Dark Portal | $0.99 | one-time |
| Grav Box | $0.99 | one-time |
| Midnight | $0.99 | one-time |
| Daybreak | $0.99 | one-time |
| Beach | $0.99 | one-time |
| Jungle | $0.99 | one-time |
| Mist | $0.99 | one-time |
| Gold Blocks (1000) Pack | $4.99 | one-time |


### Water Simulator

[App page](https://appshunter.io/ios/app/water-simulator-fluid-physics/id6757202722)

Experience realistic fluid physics with particle simulation. Tap to create streams, tilt your device to control gravity, and explore various fluid types. Offers a relaxing and immersive visual experience.

**Highlights:** Realistic fluid physics simulation, Touch interaction for particle spawning, Gyroscope control for gravity direction, Multiple fluid presets (water, honey, oil, mercury, lava), Haptic feedback for particle interaction, Real-time FPS display

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $0.29 | per 7 days |
| Monthly | $0.99 | per month |
| Yearly | $9.99 | per year |


## Frequently asked questions

### Is Grav Box free?

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

### Is Water Simulator free?

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

### Which has better reviews, Grav Box or Water Simulator?

Grav Box is rated higher. Grav Box averages 4.8 out of 5 from 26 ratings, while Water Simulator averages 3.0 from 2 ratings.

### Do Grav Box or Water Simulator have ads?

Grav Box shows ads; Water Simulator does not.

### Which is updated more often, Grav Box or Water Simulator?

Grav Box ships an update every 5 months, and Water Simulator every 5 days. Most recently, Grav Box was updated on October 24, 2026 and Water Simulator on October 23, 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.*