# Topia World Builder vs Space Crash Simulator

The clearest difference is price: Space Crash Simulator at Free against Topia World Builder's $1.99. Space Crash Simulator also leads on rating (4.5 vs 3.6) and update cadence (every 5 days vs every 6 weeks). Topia World Builder's advantage is in-app purchases (none vs 1) and ads (none vs shown). On ratings volume and device support there is nothing between them.

Space Crash Simulator is free to download; Topia World Builder costs $1.99 up front. Space Crash Simulator sells 1 one-off in-app purchase. Topia World Builder asks for nothing beyond the download.

Space Crash Simulator holds the better App Store score, 4.5 against 3.6. Both are backed by a comparable volume of ratings — 236 and 608 respectively. Written reviews point the same way: 57% of Topia World Builder's written reviews are positive against 82% of Space Crash Simulator's.

Topia World Builder ships an update every 6 weeks, Space Crash Simulator every 5 days. The most recent releases landed on October 17, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Topia World Builder | Space Crash Simulator |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [3.6 (236 ratings)](https://appshunter.io/ios/app/topia-world-builder/id534282109/reviews) | **[4.5 (608 ratings)](https://appshunter.io/ios/app/space-crash-simulator/id6742357679/reviews)** |
| Number of ratings | 236 | **608** |
| Positive reviews | 57.2% of reviews | **81.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#195** | — |
| Size | 57 MB | 254 MB |
| Requires iOS | **5.1.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Crescent Moon Games LLC](https://appshunter.io/developer/370521012) | [WPC](https://appshunter.io/developer/1681830786) |

## What reviewers say

### Topia World Builder

[App page](https://appshunter.io/ios/app/topia-world-builder/id534282109)

**Currently charting:** #195 Top Paid · Family (US App Store)

Shape a vibrant planet as a divine creator. Sculpt landscapes, grow forests, and populate your world with diverse animal life. Witness ecosystems evolve as you manage your creation.

**Highlights:** Create mountains, valleys, rivers, and oceans, Spawn and manage large animal herds, Observe animal interactions and ecosystems, Save and edit worlds, Customize land, water, and sky colors, Supports landscape and portrait modes

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Smooth and responsive
- 👍 Beautiful graphics
- 🌳 Relaxing sandbox experience

**What reviewers complain about**

- 🐛 Unbalanced animal populations
- 🔍 Lack of content and features
- 💤 Gets boring quickly

**Reported bugs**

- Birds getting stuck over the ocean
- Land animals drowning in water
- Inconsistent controls and UI

**Requested features**

- Add humans and civilization building
- Introduce natural disasters and weather effects
- Expand animal and plant diversity
- Improve ecosystem balance and predator-prey dynamics
- Implement saving and loading of created worlds


### 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


## Frequently asked questions

### Is Topia World Builder free?

Topia World Builder costs $1.99, with no in-app purchases.

### Is Space Crash Simulator free?

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

### Which has better reviews, Topia World Builder or Space Crash Simulator?

Space Crash Simulator is rated higher. Topia World Builder averages 3.6 out of 5 from 236 ratings, while Space Crash Simulator averages 4.5 from 608 ratings.

### Do Topia World Builder or Space Crash Simulator have ads?

Space Crash Simulator shows ads; Topia World Builder does not.

### Which is updated more often, Topia World Builder or Space Crash Simulator?

Topia World Builder ships an update every 6 weeks, and Space Crash Simulator every 5 days. Most recently, Topia World Builder was updated on October 17, 2026 and Space Crash Simulator on October 18, 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.*