# Planet Fun vs DIY Solar System

The clearest difference is rating: Planet Fun at 4.8 against DIY Solar System's 4.5. Planet Fun also leads on update cadence (every 4 weeks vs every 2 months). On price, ratings volume, 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.

Planet Fun holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 8 and 16 respectively.

Planet Fun ships an update every 4 weeks, DIY Solar System every 2 months. The most recent releases landed on June 4, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | Planet Fun | DIY Solar System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (8 ratings)](https://appshunter.io/ios/app/planet-fun/id1525941640/reviews)** | [4.5 (16 ratings)](https://appshunter.io/ios/app/diy-solar-system/id1644242890/reviews) |
| Number of ratings | 8 | **16** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 161 MB | 180 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Omar reis](https://appshunter.io/developer/687921629) | [The Lawrence Hall of Science](https://appshunter.io/developer/462994550) |

## What reviewers say

### Planet Fun

[App page](https://appshunter.io/ios/app/planet-fun/id1525941640)

Explore a 4D solar system simulation with accurate astronomical calculations for planets, moons, and stars. Interact with the celestial bodies using touch gestures, set any date and time, and even view your GPS position in augmented reality.

**Highlights:** 4D solar system simulation, Configurable animation speed, Augmented reality mode, Almanac module with ephemeris calculators, Touch gesture controls, Star and constellation visualization

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Planet Fun free?

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

### Is DIY Solar System free?

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

### Which has better reviews, Planet Fun or DIY Solar System?

Planet Fun is rated higher. Planet Fun averages 4.8 out of 5 from 8 ratings, while DIY Solar System averages 4.5 from 16 ratings.

### Do Planet Fun or DIY Solar System have ads?

Neither Planet Fun nor DIY Solar System shows ads.

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

Planet Fun ships an update every 4 weeks, and DIY Solar System every 2 months. Most recently, Planet Fun was updated on June 4, 2026 and DIY Solar System on June 3, 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.*