# Sol Explorer vs Stars Units Sizes Objects

The clearest difference is rating: Sol Explorer at 5.0 against Stars Units Sizes Objects's 4.3. Sol Explorer also leads on ads (none vs shown) and review sentiment (100% vs 80%). Stars Units Sizes Objects's advantage is update cadence (every 4 months vs every 86 months) and iOS requirement (11.0 vs 16.0). On price, ratings volume, 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.

Sol Explorer holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 6 and 6 respectively. Written reviews point the same way: 100% of Sol Explorer's written reviews are positive against 80% of Stars Units Sizes Objects's.

Sol Explorer ships an update every 86 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Sol Explorer | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/sol-explorer/id556558274/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews) |
| Number of ratings | 6 | 6 |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 86 months | **Every 4 months** |
| Monetization | **Free** | Ad-supported |
| Size | 268 MB | 124 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Reason Interactive](https://appshunter.io/developer/333333690) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### Sol Explorer

[App page](https://appshunter.io/ios/app/sol-explorer/id556558274)

Experience our Solar System from a first-person perspective in your own spaceship. Explore planets, moons, and space probes, traveling billions of miles across the cosmos. Learn about over 40 celestial objects and gain new perspectives on Earth and beyond.

**Highlights:** First-person spaceship exploration, Travel across the entire Solar System, Learn about 40+ celestial objects, Explore planets, moons, and probes, View from the edge of interstellar space, Size comparison videos

**Features:** macOS Compatibility, Vision Pro support

**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, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sol Explorer free?

Sol Explorer 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, Sol Explorer or Stars Units Sizes Objects?

Sol Explorer is rated higher. Sol Explorer averages 5.0 out of 5 from 6 ratings, while Stars Units Sizes Objects averages 4.3 from 6 ratings.

### Do Sol Explorer or Stars Units Sizes Objects have ads?

Stars Units Sizes Objects shows ads; Sol Explorer does not.

### Which is updated more often, Sol Explorer or Stars Units Sizes Objects?

Sol Explorer ships an update every 86 months, and Stars Units Sizes Objects every 4 months. Most recently, Sol Explorer was updated on October 24, 2026 and Stars Units Sizes Objects on October 31, 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.*