# Grav Box vs Universe Gravity Simulator 3D

The clearest difference is review sentiment: Grav Box at 96% against Universe Gravity Simulator 3D's 43%. Grav Box also leads on rating (4.8 vs 4.0). Universe Gravity Simulator 3D's advantage is ads (none vs shown) and update cadence (every 5 weeks vs every 5 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Grav Box sells 10 one-off in-app purchases and Universe Gravity Simulator 3D sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Grav Box holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Universe Gravity Simulator 3D has 143 ratings behind it against 26, 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 43% of Universe Gravity Simulator 3D's.

Grav Box ships an update every 5 months, Universe Gravity Simulator 3D every 5 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Grav Box | Universe Gravity Simulator 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (26 ratings)](https://appshunter.io/ios/app/grav-box/id1050320618/reviews)** | [4.0 (143 ratings)](https://appshunter.io/ios/app/universe-gravity-simulator-3d/id1613476121/reviews) |
| Number of ratings | 26 | **143** |
| Positive reviews | **96.0% of reviews** | 42.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 235 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gianluca Capraro](https://appshunter.io/developer/1691787728) | [KUNHAR GAMES LTD](https://appshunter.io/developer/1613476123) |

## 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 |


### Universe Gravity Simulator 3D

[App page](https://appshunter.io/ios/app/universe-gravity-simulator-3d/id1613476121)

Explore and shape the cosmos in this 3D space simulator. Create galaxies, destroy planets, and engage in epic space battles. Experience realistic physics and stunning visuals as you journey through star realms.

**Highlights:** Realistic physics engine, Dynamic universe creation, Immersive 3D environments, Gravity simulation, Solar system exploration, Interplanetary collisions, Space combat missions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Grav Box free?

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

### Is Universe Gravity Simulator 3D free?

Universe Gravity Simulator 3D is free to download, with in-app purchases available.

### Which has better reviews, Grav Box or Universe Gravity Simulator 3D?

Grav Box is rated higher. Grav Box averages 4.8 out of 5 from 26 ratings, while Universe Gravity Simulator 3D averages 4.0 from 143 ratings.

### Do Grav Box or Universe Gravity Simulator 3D have ads?

Grav Box shows ads; Universe Gravity Simulator 3D does not.

### Which is updated more often, Grav Box or Universe Gravity Simulator 3D?

Grav Box ships an update every 5 months, and Universe Gravity Simulator 3D every 5 weeks. Most recently, Grav Box was updated on November 2, 2026 and Universe Gravity Simulator 3D on November 3, 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.*