# My Solar System vs Stars Units Sizes Objects

The clearest difference is rating: Stars Units Sizes Objects at 4.3 against My Solar System's 2.4. Stars Units Sizes Objects also leads on review sentiment (80% vs 42%). My Solar System's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases and device support there is nothing between them.

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

Stars Units Sizes Objects holds the better App Store score, 4.3 against 2.4. Both are backed by a comparable volume of ratings — 24 and 6 respectively. Written reviews point the same way: 42% of My Solar System's written reviews are positive against 80% of Stars Units Sizes Objects's.

## The numbers

| Metric | My Solar System | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (24 ratings)](https://appshunter.io/ios/app/my-solar-system/id1150230308/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews)** |
| Number of ratings | **24** | 6 |
| Positive reviews | 41.7% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | — | Every 4 months |
| Monetization | **Free** | Ad-supported |
| Size | 33 MB | 124 MB |
| Requires iOS | **9.3** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ALEXANDER SKALOV](https://appshunter.io/developer/1074092322) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### My Solar System

[App page](https://appshunter.io/ios/app/my-solar-system/id1150230308)

Become the creator of the universe by placing planets in their correct orbits. Experience the forces of gravity as planets interact with each other and the sun. Test your knowledge of planetary order and aim for a high score in this educational simulation.

**Highlights:** Create and place planets, Simulate gravity between celestial bodies, Observe planetary orbits, Test knowledge of planet order, Score-based progression

**Features:** macOS Compatibility

**In-app purchases:** none


### Stars Units Sizes Objects

[App page](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571)

Explore the vastness of the universe, from the smallest particles to the largest cosmic structures. Compare object sizes, view detailed images, and perform unit conversions across a wide range of astronomical scales. Learn about stars, galaxies, and the incredible distances between them.

**Highlights:** Compare object sizes, View object images, Pinch/Zoom and Pan images, Unit conversion for distances, Explore scales from Planck length to observable universe, Learn about stars and galaxies

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is My Solar System free?

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

### Is Stars Units Sizes Objects free?

Stars Units Sizes Objects is free to download, with no in-app purchases.

### Which has better reviews, My Solar System or Stars Units Sizes Objects?

Stars Units Sizes Objects is rated higher. My Solar System averages 2.4 out of 5 from 24 ratings, while Stars Units Sizes Objects averages 4.3 from 6 ratings.

### Do My Solar System or Stars Units Sizes Objects have ads?

Stars Units Sizes Objects shows ads; My Solar System does not.

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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.*