# Universe Size Comparison

> 3D astronomical app comparing celestial body sizes and dimensions. (iPhone/iPad app by Daniele Citi.)

- Source: https://appshunter.io/ios/app/universe-size-comparison/id1473946290 (this page in markdown: same URL + `.md`)
- Developer: [Daniele Citi](https://appshunter.io/developer/1187632258)
- Category: Education, Entertainment
- Price: $1.99
- Rating: 3.10/5 from 29 App Store ratings · 8 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 411 MB
- Languages: American English, Italian
- Released: 2020-02-08
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/universe-size-comparison/id1473946290/reviews.md

## What is Universe Size Comparison?

Universe Size Comparison is a unique 3D astronomical app that will make you understand the real dimensions of the universe and how small we are.

Have you ever wondered how big the Sun is compared to Earth? Or what is the largest planet between Mars and Earth? Do you want to find out the dimensions of some of the most famous stars in the sky like Rigel and Betelgeuse in comparison to our Sun? Do you want to compare everything with the hypergiant star VY Canis Majoris? Universe Size Comparison is the right app for you.

The app offers two modes: Tour Mode and Free Mode.

Tour mode will guide you on a spectacular journey where you will see planets and stars compared in full scale. All accompanied by simple and clear explanations regardless of the level of knowledge of the subject.

The Free mode will allow you to compare two celestial bodies of your choice in scale. You will also find out more information on the bodies you are comparing thanks to an elegant user interface designed to offer the maximum user experience.

## Key features

- 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

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/universe-size-comparison/id1473946290/reviews.md

### 5/5 — Can ya add more?

*2026-03-13*

Here’s a list of the things I think you should add, Madame Citi!

The List:
Whirlpool galaxy
Triangulum galaxy
Andromeda galaxy
IC 1101
Condor galaxy
Tadpole galaxy
Hoag’s Object
Sagittarius A*
TON 618
Pheonix A (largest known black hole)
Fireworks galaxy

### 4/5 — Ok but…

*2026-01-04*

This game could use a bit more objects. Oh I could go on an on! But the ones I would like you to add someday are UY Scuti, RSGC1-F01, Antares and Arcturus.

### 5/5 — New Update

*2025-04-30*

Oh the code where supernovas play, the Milky Way’s here to save the day.

**Developer response:** Thanks a lot for your review! 😊 Stay tuned for more exciting updates incoming!

### 5/5 — Universe Size Comparison

*2025-01-25*

That is so good!

**Developer response:** Hello, thanks a lot for your review! Much appreciated! 😊

### 3/5 — Exiting

*2023-09-24*

Where can I exit the two pictures 1/24 1/24?

**Developer response:** Hello! Thanks a lot for your feedback! You can swipe right/left on both windows to select the two objects. Once you've done, just swipe down from the bottom page or swipe up from the upper one. Let me know if this helped!

### 3/5 — Needs more objects

*2022-11-10*

Add dwarf planets, exoplanets, more stars and moons, nebulas, galaxys,galaxy clusters.

### 5/5 — Amazing

*2021-02-05*

This is absolutely amazing! However I would like for you to add Stephenson 2-18 to be comparable with the others. Otherwise, amazing app. I recommend this.

### 3/5 — More

*2020-03-14*

Can you add some more moons, dwarf planets, nebulae, galaxies, galaxy clusters, the observable universe, and some more stars.

## Frequently asked questions about Universe Size Comparison

### What celestial bodies can I compare with Universe Size Comparison?

Universe Size Comparison allows you to compare planets, stars, and even hypergiant stars like VY Canis Majoris. You can compare our Sun to other stars and planets, and explore the relative sizes of various celestial objects.

### Does Universe Size Comparison offer different ways to learn?

Yes, it offers two modes: Tour Mode, which guides you on a spectacular journey with clear explanations, and Free Mode, where you can choose any two celestial bodies to compare in scale.

### Is Universe Size Comparison suitable for all ages?

Universe Size Comparison is rated 4+ and is designed to be accessible with simple and clear explanations, making it suitable for a wide audience interested in learning about space.

### What devices does Universe Size Comparison support?

Universe Size Comparison is available on Apple TV, iPhone, iPad, and iPod, offering a versatile experience across Apple devices.

### How often is Universe Size Comparison updated?

The app was last updated on April 29, 2025, with version 1.5. This indicates ongoing development and potential for future improvements and content additions.

### What is the user sentiment for Universe Size Comparison?

Universe Size Comparison has an average rating of 3.1 stars from 24 ratings. While this indicates room for improvement, it suggests some users find value in its unique approach to visualizing space.

### Does Universe Size Comparison have ads?

No, Universe Size Comparison does not contain advertisements. This provides an uninterrupted learning experience for users.

### What is the price of Universe Size Comparison?

Universe Size Comparison is a paid app, available for $1.99. This one-time purchase grants access to all its features without further in-app purchases.

## Version history (last 5 releases)

### 1.5 — 2025-04-29

Bug fixing.

### 1.4.1 — 2023-06-05

Added a new planet: Ceres!

### 1.4 — 2023-02-18

Minor fixes.

### 1.3.1 — 2021-09-28

Optimized for iPad mini

### 1.3 — 2021-09-26

Added 2 new stars to Free Mode: Proxima Centauri and Stephenson 2-18

## Apps similar to Universe Size Comparison

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [PlanetenSpielundApp2b](https://appshunter.io/ios/app/planetenspielundapp2b/id1494749871) | 3.5 (2) | Free | Education |
| [Univerzoom 2D Size Comparison](https://appshunter.io/ios/app/univerzoom-2d-size-comparison/id1598332779) | 4.6 (65) | Free | Education |
| [Galaxy Map - Stars and Planets](https://appshunter.io/ios/app/galaxy-map-stars-and-planets/id1156869755) | 4.6 (68) | $12.99 | Education |
| [Universal Zoom - Science Guide](https://appshunter.io/ios/app/universal-zoom-science-guide/id807673066) | 4.8 (345) | $5.99 | Education |
| [Univerzoom 3D - Explore Scale](https://appshunter.io/ios/app/univerzoom-3d-explore-scale/id1552648156) | 4.8 (289) | $2.99 | Education |
| [Stars Units Sizes Objects](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571) | 4.2 (5) | Free | Education |

## More apps by Daniele Citi

- [Ghost Jump](https://appshunter.io/ios/app/ghost-jump/id1198269159)
- [Eggy Bird](https://appshunter.io/ios/app/eggy-bird/id1231766042)
- [AR_Planets](https://appshunter.io/ios/app/ar-planets/id1297893098)
- [ARPlanets 2](https://appshunter.io/ios/app/arplanets-2/id1387711637)
- [Angry Route](https://appshunter.io/ios/app/angry-route/id1445172199)
- [Pirate Sails AR](https://appshunter.io/ios/app/pirate-sails-ar/id1466943268)

All apps by Daniele Citi: https://appshunter.io/developer/1187632258

## Related topics

[universe size comparison](https://appshunter.io/ios/topics/universe-size-comparison)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*