# Space Crash Simulator vs Gravity OB1

The clearest difference is ads: Gravity OB1 at none against Space Crash Simulator's shown. Gravity OB1 also leads on iOS requirement (13.4 vs 15.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Space Crash Simulator sells 1 one-off in-app purchase and Gravity OB1 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 28, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Space Crash Simulator | Gravity OB1 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (753 ratings)](https://appshunter.io/ios/app/space-crash-simulator/id6742357679/reviews)** | — |
| Number of ratings | **753** | — |
| Positive reviews | 81.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 254 MB | 25 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WPC](https://appshunter.io/developer/1681830786) | [Q8blog](https://appshunter.io/developer/380669318) |

## What reviewers say

### Space Crash Simulator

[App page](https://appshunter.io/ios/app/space-crash-simulator/id6742357679)

Experience realistic planetary collisions with a powerful physics engine. Customize your own cosmic events by adjusting particle count, velocity, and accuracy, or jump straight into high-energy impacts. This app offers a detailed, physics-based simulation for educational or entertainment purposes.

**Highlights:** Smoothed Particle Hydrodynamics (SPH) simulation, Real-time planetary collisions, Customizable simulation parameters, Setup Mode for scenario creation, Adjustable particle count and accuracy, Physics-based detailed simulation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | one-time |

**What reviewers like**

- 👍 Great game
- 🚀 Awesome graphics
- 💡 Interesting simulation features
- 🎉 Fun and enjoyable

**What reviewers complain about**

- 🐛 Occasional performance issues
- 💰 Too many ads

**Reported bugs**

- Collision trails not clearing properly
- Protoplanetary disc mode not working as expected

**Requested features**

- Add more celestial objects (black holes, stars, etc.)
- Allow for custom textures and planet/atmosphere customization
- Improve performance and optimization
- Add more graphic options and settings
- Allow for custom rings and moons around planets


### Gravity OB1

[App page](https://appshunter.io/ios/app/gravity-ob1/id6788852525)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Game | $3.99 | one-time |


## Frequently asked questions

### Is Space Crash Simulator free?

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

### Is Gravity OB1 free?

Gravity OB1 is free to download, with in-app purchases available.

### Do Space Crash Simulator or Gravity OB1 have ads?

Space Crash Simulator shows ads; Gravity OB1 does not.

### Which is updated more often, Space Crash Simulator or Gravity OB1?

Space Crash Simulator ships an update every 5 days, and Gravity OB1 every 5 days. Most recently, Space Crash Simulator was updated on October 28, 2026 and Gravity OB1 on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*