# Universe in a Nutshell vs Stars Units Sizes Objects

The clearest difference is price: Stars Units Sizes Objects at Free against Universe in a Nutshell's $2.99. Stars Units Sizes Objects also leads on iOS requirement (11.0 vs 13.0). Universe in a Nutshell's advantage is rating (4.9 vs 4.3) and ads (none vs shown). On in-app purchases and device support there is nothing between them.

Stars Units Sizes Objects is free to download; Universe in a Nutshell costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Universe in a Nutshell holds the better App Store score, 4.9 against 4.3. That said, the two scores are not equally well evidenced: Universe in a Nutshell has 2.5K ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 89% of Universe in a Nutshell's written reviews are positive against 80% of Stars Units Sizes Objects's.

Universe in a Nutshell ships an update every 4 days, Stars Units Sizes Objects every 4 months. Both last shipped on October 31, 2026.

## The numbers

| Metric | Universe in a Nutshell | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.9 (2.5K ratings)](https://appshunter.io/ios/app/universe-in-a-nutshell/id1526364758/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews) |
| Number of ratings | **2.5K** | 6 |
| Positive reviews | **89.1% of reviews** | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 4 months |
| Monetization | **Free** | Ad-supported |
| Best chart rank | **#47** | — |
| Size | 320 MB | 124 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [in a nutshell - kurzgesagt GmbH](https://appshunter.io/developer/1526364760) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### Universe in a Nutshell

[App page](https://appshunter.io/ios/app/universe-in-a-nutshell/id1526364758)

**Currently charting:** #47 Top Paid · Education (US App Store)

Explore the vastness of the universe, from subatomic particles to distant galaxies, through an interactive, swipe-based journey. Understand true scale by comparing objects and discover fascinating facts about over 250 animated illustrations. Immerse yourself in the cosmos with original music.

**Highlights:** Interactive scale exploration, Seamless zooming from 10^-35m to 10^26m, Fun facts about objects, Explanations for each object, Over 250 animated illustrations, Original music soundtrack

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🤩 Fascinating and educational
- 🎨 Beautiful artwork and animations
- 🎶 Relaxing background music
- 📚 Comprehensive information on a wide range of topics
- 🔍 Intuitive and easy to navigate

**What reviewers complain about**

- 🐛 Crashes on some devices, especially older iPhones
- 🔍 Difficulty comparing sizes of objects due to positioning
- 🕹️ Laggy animations and transitions on some devices
- 🌐 Lack of offline functionality

**Reported bugs**

- Crashes on launch for some users
- Overlapping hit boxes make it difficult to select certain objects

**Requested features**

- Add more objects to explore (e.g. Uranus, Eris, more moons, etc.)
- Implement a search function to quickly find specific objects
- Add the ability to compare multiple objects side-by-side
- Include more in-depth scientific information and facts
- Provide an option to have the descriptions read aloud


### 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 in a Nutshell free?

Universe in a Nutshell costs $2.99, 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 in a Nutshell or Stars Units Sizes Objects?

Universe in a Nutshell is rated higher. Universe in a Nutshell averages 4.9 out of 5 from 2.5K ratings, while Stars Units Sizes Objects averages 4.3 from 6 ratings.

### Do Universe in a Nutshell or Stars Units Sizes Objects have ads?

Stars Units Sizes Objects shows ads; Universe in a Nutshell does not.

### Which is updated more often, Universe in a Nutshell or Stars Units Sizes Objects?

Universe in a Nutshell ships an update every 4 days, and Stars Units Sizes Objects every 4 months. Most recently, Universe in a Nutshell was updated on October 31, 2026 and Stars Units Sizes Objects on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*