# Planet simulation vs iBuilder

The clearest difference is review sentiment: Planet simulation at 74% against iBuilder's 16%. Planet simulation also leads on rating (3.9 vs 2.3) and in-app purchases (none vs 1). iBuilder's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. iBuilder sells 1 one-off in-app purchase. Planet simulation asks for nothing beyond the download.

Planet simulation holds the better App Store score, 3.9 against 2.3. That said, the two scores are not equally well evidenced: Planet simulation has 165 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 74% of Planet simulation's written reviews are positive against 16% of iBuilder's.

Planet simulation ships an update every 8 months, iBuilder every 29 months. Both last shipped on October 4, 2026.

## The numbers

| Metric | Planet simulation | iBuilder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (165 ratings)](https://appshunter.io/ios/app/planet-simulation/id356146219/reviews)** | [2.3 (11 ratings)](https://appshunter.io/ios/app/ibuilder/id453519722/reviews) |
| Number of ratings | **165** | 11 |
| Positive reviews | **74.3% of reviews** | 16.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 8 months** | Every 29 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 15 MB | 18 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DAN-BALL](https://appshunter.io/developer/348592290) | [Sea Venture LLC](https://appshunter.io/developer/312276940) |

## What reviewers say

### Planet simulation

[App page](https://appshunter.io/ios/app/planet-simulation/id356146219)

Design and build your own solar system with various stars. Explore the fascinating world of gravity and recreate celestial bodies. A relaxing game for your spare time.

**Highlights:** Create your own solar system, Simulate gravity, Design with various stars, Reproduce celestial bodies, Relaxing gameplay

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Realistic gravity simulation
- 👍 Fun to mess around with
- 🎨 Visually appealing
- 🤖 Good for learning about planetary motion

**What reviewers complain about**

- 🐛 Planets often crash into the sun
- 🔍 Limited features and customization options
- 📢 Distracting ads
- 🤯 Confusing controls and UI

**Reported bugs**

- Planets sometimes disappear or behave erratically
- App crashes or freezes occasionally
- Scaling and scrolling issues

**Requested features**

- Add more celestial objects (black holes, supernovas, etc.)
- Allow for more complex orbits and binary systems
- Implement a save/load feature for solar systems
- Add a tutorial or help section
- Integrate with educational resources on astronomy


### iBuilder

[App page](https://appshunter.io/ios/app/ibuilder/id453519722)

This is a creative building game where you can construct anything you imagine using over 60 block types. Design entire cities with customizable terrain, realistic graphics, and dynamic environmental effects.

**Highlights:** Build castles, docks, mansions, and more, Over 60 different block types, Random terrain generation, Customizable island size and vegetation, 360-degree camera control, Realistic water, sky, and sun effects, Save up to 3 worlds

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iBuilder | $1.99 | one-time |

**What reviewers like**

- 🚀 Realistic graphics
- 👍 Relaxing gameplay

**What reviewers complain about**

- 🐛 Frequent crashes
- 👎 Confusing controls
- 💰 Paywall for full experience
- 🚫 Lack of content and features

**Reported bugs**

- Blocks disappearing after placement
- Inability to delete or move placed blocks

**Requested features**

- Ability to modify terrain
- Addition of characters and wildlife
- More building options and tools


## Frequently asked questions

### Is Planet simulation free?

Planet simulation is free to download, with no in-app purchases.

### Is iBuilder free?

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

### Which has better reviews, Planet simulation or iBuilder?

Planet simulation is rated higher. Planet simulation averages 3.9 out of 5 from 165 ratings, while iBuilder averages 2.3 from 11 ratings.

### Do Planet simulation or iBuilder have ads?

Planet simulation shows ads; iBuilder does not.

### Which is updated more often, Planet simulation or iBuilder?

Planet simulation ships an update every 8 months, and iBuilder every 29 months. Most recently, Planet simulation was updated on October 4, 2026 and iBuilder on October 4, 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.*