# DIY Solar System vs Planetarium Projector

The clearest difference is review sentiment: DIY Solar System at 100% against Planetarium Projector's 22%. DIY Solar System also leads on ratings volume (17 vs 1). Planetarium Projector's advantage is rating (5.0 vs 4.5). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Planetarium Projector holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: DIY Solar System has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 100% of DIY Solar System's written reviews are positive against 22% of Planetarium Projector's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | DIY Solar System | Planetarium Projector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (17 ratings)](https://appshunter.io/ios/app/diy-solar-system/id1644242890/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/planetarium-projector/id6471595659/reviews)** |
| Number of ratings | **17** | 1 |
| Positive reviews | **100.0% of reviews** | 22.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 180 MB | 574 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Lawrence Hall of Science](https://appshunter.io/developer/462994550) | [Clementoni S.p.A.](https://appshunter.io/developer/575135209) |

## What reviewers say

### 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


### Planetarium Projector

[App page](https://appshunter.io/ios/app/planetarium-projector/id6471595659)

Explore the universe with interactive lessons on constellations, planets, and space exploration. Engage with 3D augmented reality models and fun quizzes to learn about space history and mythology.

**Highlights:** Interactive space narrator, Augmented reality 3D models, Constellation drawing, Space conquest quiz, Planet and space facts, Rocket launching game

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DIY Solar System free?

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

### Is Planetarium Projector free?

Planetarium Projector is free to download, with no in-app purchases.

### Which has better reviews, DIY Solar System or Planetarium Projector?

Planetarium Projector is rated higher. DIY Solar System averages 4.5 out of 5 from 17 ratings, while Planetarium Projector averages 5.0 from 1 ratings.

### Do DIY Solar System or Planetarium Projector have ads?

Neither DIY Solar System nor Planetarium Projector shows ads.

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

DIY Solar System ships an update every 2 months, and Planetarium Projector every 2 months. Most recently, DIY Solar System was updated on November 3, 2026 and Planetarium Projector on November 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.*