Comparison

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.

Head to head
About

Interactive Solar System

Features
Read full description

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.

About

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.

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
Read full description

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

Universe Size Comparison4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
Interactive Solar System versus Universe Size Comparison: the parameters behind the verdict, then further details
ParameterInteractive Solar SystemUniverse Size Comparison
Price$1.99$1.99
Rating3.1 (29 ratings) — better
Positive reviews66.7% of reviews
Number of ratings29 — better
Update frequencyFortnightly — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid
DevicesiPad, Apple TViPhone, iPad, iPod, Apple TV — better
Requires iOS12.0 — better13.0
Further details — not scored
Size52 MB411 MB
Age rating4+4+
DeveloperVentura Educational SystemsDaniele Citi

In-app purchases

None

Interactive Solar System

No in-app purchases

None

Universe Size Comparison

No in-app purchases

Questions

Is Interactive Solar System free?
Interactive Solar System costs $1.99, with no in-app purchases.
Is Universe Size Comparison free?
Universe Size Comparison costs $1.99, with no in-app purchases.
Do Interactive Solar System or Universe Size Comparison have ads?
Neither Interactive Solar System nor Universe Size Comparison shows ads.
Which is updated more often, Interactive Solar System or Universe Size Comparison?
Interactive Solar System ships an update fortnightly, and Universe Size Comparison every 4 months. Most recently, Interactive Solar System was updated on September 18, 2026 and Universe Size Comparison on September 15, 2026.

Other comparisons