# Universe Size Comparison vs Stars Units Sizes Objects

The clearest difference is price: Stars Units Sizes Objects at Free against Universe Size Comparison's $1.99. Stars Units Sizes Objects also leads on rating (4.3 vs 3.2) and review sentiment (80% vs 70%). Universe Size Comparison's advantage is ads (none vs shown) and ratings volume (30 vs 6). On update cadence, in-app purchases and device support there is nothing between them.

Stars Units Sizes Objects is free to download; Universe Size Comparison costs $1.99 up front. 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 3.2. That said, the two scores are not equally well evidenced: Universe Size Comparison has 30 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 70% of Universe Size Comparison's written reviews are positive against 80% of Stars Units Sizes Objects's.

Universe Size Comparison ships an update every 3 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Universe Size Comparison | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [3.2 (30 ratings)](https://appshunter.io/ios/app/universe-size-comparison/id1473946290/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews)** |
| Number of ratings | **30** | 6 |
| Positive reviews | 70.0% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Paid | **Ad-supported** |
| Size | 411 MB | 124 MB |
| Requires iOS | 17.0 | **11.0** |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Daniele Citi](https://appshunter.io/developer/1187632258) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### Universe Size Comparison

[App page](https://appshunter.io/ios/app/universe-size-comparison/id1473946290)

Explore the vastness of space and understand celestial body dimensions through interactive 3D comparisons. Discover the scale of planets and stars, from our Sun to hypergiant stars, with guided tours and free comparison modes.

**Highlights:** 3D astronomical comparisons, Tour Mode with guided explanations, Free Mode for custom comparisons, Scale comparisons of planets and stars, Detailed celestial body information, Elegant user interface

**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 Universe Size Comparison free?

Universe Size Comparison costs $1.99, 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, Universe Size Comparison or Stars Units Sizes Objects?

Stars Units Sizes Objects is rated higher. Universe Size Comparison averages 3.2 out of 5 from 30 ratings, while Stars Units Sizes Objects averages 4.3 from 6 ratings.

### Do Universe Size Comparison or Stars Units Sizes Objects have ads?

Stars Units Sizes Objects shows ads; Universe Size Comparison does not.

### Which is updated more often, Universe Size Comparison or Stars Units Sizes Objects?

Universe Size Comparison ships an update every 3 months, and Stars Units Sizes Objects every 4 months. Most recently, Universe Size Comparison was updated on October 29, 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.*