# Solar System (Lite) vs Stars Units Sizes Objects

The clearest difference is ads: Solar System (Lite) at none against Stars Units Sizes Objects's shown. Solar System (Lite) also leads on rating (4.5 vs 4.2) and monetization model (free vs ad-supported). Stars Units Sizes Objects's advantage is device support (3 vs 1). On price, review sentiment, update cadence 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.

Solar System (Lite) holds the better App Store score, 4.5 against 4.2. Both are backed by a comparable volume of ratings — 23 and 5 respectively. Written reviews point the same way: 83% of Solar System (Lite)'s written reviews are positive against 80% of Stars Units Sizes Objects's.

Solar System (Lite) ships an update every 3 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on July 6, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Solar System (Lite) | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (23 ratings)](https://appshunter.io/ios/app/solar-system-lite/id593614944/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews) |
| Number of ratings | **23** | 5 |
| Positive reviews | **83.3% of reviews** | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Free** | Ad-supported |
| Size | 91 MB | 124 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Vosonos LLC](https://appshunter.io/developer/578659631) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### Solar System (Lite)

[App page](https://appshunter.io/ios/app/solar-system-lite/id593614944)

Explore the Solar System with interactive simulations and size comparisons. This educational app makes learning about planets, galaxies, and space exploration engaging for children. It offers a kid-friendly interface with no ads or in-app purchases.

**Highlights:** Interactive simulations, Size comparisons of celestial bodies, Planetary orbital speed visualization, Covers Milky Way, Sun, planets, dwarf planets, Kid-friendly navigation, No ads or in-app purchases

**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 Solar System (Lite) free?

Solar System (Lite) 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, Solar System (Lite) or Stars Units Sizes Objects?

Solar System (Lite) is rated higher. Solar System (Lite) averages 4.5 out of 5 from 23 ratings, while Stars Units Sizes Objects averages 4.2 from 5 ratings.

### Do Solar System (Lite) or Stars Units Sizes Objects have ads?

Stars Units Sizes Objects shows ads; Solar System (Lite) does not.

### Which is updated more often, Solar System (Lite) or Stars Units Sizes Objects?

Solar System (Lite) ships an update every 3 months, and Stars Units Sizes Objects every 4 months. Most recently, Solar System (Lite) was updated on July 6, 2026 and Stars Units Sizes Objects on September 7, 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.*