# X vs DIY Solar System

The clearest difference is review sentiment: DIY Solar System at 100% against X's 0%. DIY Solar System also leads on rating (4.5 vs 1.3) and in-app purchases (none vs 10). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. X sells 10 one-off in-app purchases. DIY Solar System asks for nothing beyond the download.

DIY Solar System holds the better App Store score, 4.5 against 1.3. That said, the two scores are not equally well evidenced: DIY Solar System has 17 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of X's written reviews are positive against 100% of DIY Solar System's.

X ships an update every 3 months, DIY Solar System every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | X | DIY Solar System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.3 (3 ratings)](https://appshunter.io/ios/app/x-trails-pro/id1622662470/reviews) | **[4.5 (17 ratings)](https://appshunter.io/ios/app/diy-solar-system/id1644242890/reviews)** |
| Number of ratings | 3 | **17** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 46 MB | 180 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roni Waserman](https://appshunter.io/developer/1384422367) | [The Lawrence Hall of Science](https://appshunter.io/developer/462994550) |

## What reviewers say

### X

[App page](https://appshunter.io/ios/app/x-trails-pro/id1622662470)

Explore the solar system, Earth's atmosphere, and its structure with engaging audio and video content. This app offers an entertaining and educational journey for all ages, created by a team of experts.

**Highlights:** Audio guides for Solar System Trail, On-demand content, Audio and video on Earth's atmosphere, Content on Earth's structure, Solar System exploration, Expert-created content

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A Comet's Journey | $0.99 | one-time |
| Journey To The Centre Of Earth | $0.99 | one-time |
| A Mission To Mars | $0.99 | one-time |
| A Mission To The ISS | $0.99 | one-time |
| A Voyage To Saturn | $0.99 | one-time |
| Solar System Experience | $0.99 | one-time |
| The World Under Our Feet | $0.99 | one-time |
| Tour The Atmosphere | $0.99 | one-time |
| When Dinosaurs Moved | $0.99 | one-time |
| Moons Of The Solar System | $0.99 | one-time |


### DIY Solar System

[App page](https://appshunter.io/ios/app/diy-solar-system/id1644242890)

Explore the solar system with interactive activities and an augmented reality planet walk. Learn about space travel, design a moon base, and identify celestial objects. Developed by leading science institutions, this app makes learning about space engaging for families and educators.

**Highlights:** Interactive space activities, Augmented reality planet walk, Design a moon base, Grow a space garden, Control a Mars rover, In or Out space game, NASA imagery

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is X free?

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

### Is DIY Solar System free?

DIY Solar System is free to download, with no in-app purchases.

### Which has better reviews, X or DIY Solar System?

DIY Solar System is rated higher. X averages 1.3 out of 5 from 3 ratings, while DIY Solar System averages 4.5 from 17 ratings.

### Do X or DIY Solar System have ads?

Neither X nor DIY Solar System shows ads.

### Which is updated more often, X or DIY Solar System?

X ships an update every 3 months, and DIY Solar System every 2 months. Most recently, X was updated on October 24, 2026 and DIY Solar System on October 24, 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.*