Interactive Solar System vs Universe Size Comparison
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Interactive Solar System
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Take a thrilling tour of the Solar System with the Interactive Solar System Explorer. Select the planet that you wish to explore and then hit the power button to zoom off to your destination. When you arrive a myriad of interesting facts await you. Tap a button access interesting data about each of the planets, the asteroids and the Earth's moon. Facts include distance from the sun, diameter, mass, and orbital and rotational periods -- all presented in an interactive format. Tap the info button to read interesting facts about each important object in the solar system. Teachers will really like this app. After students have read about the planets, they can tap the quiz button to measure their reading comprehension. In addition to the quiz there is also a word game that helps students review the information presented. Charts and graphs are used to present comparison information about the planets. Interactive Solar System Explorer is available for iOS and tvOS devices. It is just beautiful on a big screen TV and would be a wonderfully exciting tool in any science classroom.
Universe Size Comparison
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.
- 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
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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.
Screenshots
Verdict
The clearest difference is update cadence: Interactive Solar System at fortnightly against Universe Size Comparison's every 4 months. Universe Size Comparison's advantage is device support (4 vs 2). On price, ads, in-app purchases and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Interactive Solar System costs $1.99 and Universe Size Comparison $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Interactive Solar System ships an update fortnightly, Universe Size Comparison every 4 months. The most recent releases landed on September 18, 2026 and September 15, 2026 respectively.
| Parameter | Interactive Solar System | Universe Size Comparison |
|---|---|---|
| Price | $1.99 | $1.99 |
| Rating | — | 3.1 (29 ratings) — better |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | — | 29 — better |
| Update frequency | Fortnightly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPad, Apple TV | iPhone, iPad, iPod, Apple TV — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 52 MB | 411 MB |
| Age rating | 4+ | 4+ |
| Developer | Ventura Educational Systems | Daniele Citi |
In-app purchases
Interactive Solar System
No in-app purchases
Universe Size Comparison
No in-app purchases
Questions
Is Interactive Solar System free?
Is Universe Size Comparison free?
Do Interactive Solar System or Universe Size Comparison have ads?
Which is updated more often, Interactive Solar System or Universe Size Comparison?
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