Comparison

Interactive Minds 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 Minds Solar System

Explore the Solar System with an interactive science book designed for young learners. Features engaging 3D simulations, striking visuals, and fascinating facts to make learning about space fun and educational for kids at home or in the classroom.

Highlights
  • Interactive 3D simulations
  • Visual size comparisons of celestial bodies
  • Demonstrates planetary orbits and speeds
  • Explains planetary tilt, rotation, day/night cycles, and seasons
  • Shows Solar System scale and distances
  • Compares gravity on different celestial bodies
  • Covers Milky Way, Sun, planets, moons, dwarf planets, and more
Features
Read full description

The perfect way for kids to experience the Solar System in a hands-on way! This interactive science book contains 58 pages and is filled with images, videos, and interactive simulations. ----- OVERVIEW ----- This app is great for young minds, both at home and in the classroom! •••• Parents •••• This app is sure to captivate any child with its myriad of interesting facts, striking visuals, and engaging 3D simulations. Not only is the content fascinating to explore, it's educational too! Designed with grade school curriculum in mind, this app covers the major topics of the Solar System while explaining concepts in an easy to understand manner. •••• Teachers •••• Many schools with iPads in the classroom have already used this app with great success. The interactive content is well suited for teaching complex topics such as planetary seasons and planet size differences. Children can explore this information independently or with the aid of a teacher. ----- INTERACTIVE CONTENT ----- Even as an adult, it can be difficult to visualize just how massive the Sun is or how vast the distances in the Solar System are. This app uses interactive simulations to allow children to explore these hard to visualize topics in a hands-on way. •••• Size Comparison •••• This page allows children to compare the sizes of many Solar System objects. Comparable objects include the Sun, the planets, major moons, and all the dwarf planets. •••• Planetary Revolutions •••• The planets are shown orbiting the Sun at their comparative speeds. Selecting Neptune reveals it takes 164.8 Earth years to orbit the Sun once while the inner planets seem to orbit the Sun at a dizzying speed. Select Mercury, with a year of 88 Earth days, and the outer planets barely seem to move at all. •••• Planetary Tilt & Rotation •••• Days, years, and seasons can be experienced for each of the 8 planets. 3D visuals show how planet rotation causes the day/night cycle and seasons are caused by the axial tilt of the planet as it orbits the Sun. •••• Solar System Scale •••• The planetary orbits are shown to scale. From the Sun to the outer dwarf planets, children can zoom out to see how big the Solar System is. •••• Gravity •••• This activity allows the comparison of gravity on Earth to gravity on the Sun, the planets, and the Moon. The weight of a person on Earth is compared to what their weight would be on another planetary body. ----- TOPICS COVERED ----- With over 50 pages of content, this app covers a wide range of topics: • The Milky Way galaxy • The Sun • The planets and their moons • The dwarf planets • Comets and meteors • The asteroid belt, the Kuiper belt, and the Oort cloud • How the Solar System was formed • Planetary size comparisons • Planetary day and night cycles • Planetary years and seasons • Planetary orbits • Gravity • Planetary magnetic fields • The history of space exploration ----- KID FRIENDLY ----- • Easy to use page navigation and search • NO ads • NO in-app purchases ----- MORE INFORMATION ----- Visit http://vosonos.net/product/the-solar-system

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 rating: Interactive Minds Solar System at 5.0 against Universe Size Comparison's 3.1. Interactive Minds Solar System also leads on iOS requirement (8.0 vs 17.0). Universe Size Comparison's advantage is ratings volume (29 vs 6) and device support (3 vs 1). On review sentiment, update cadence, ads and in-app purchases 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 Minds Solar System costs $2.99 and Universe Size Comparison $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Interactive Minds Solar System holds the better App Store score, 5.0 against 3.1. Both are backed by a comparable volume of ratings — 6 and 29 respectively. Written reviews split almost evenly too, at 70% and 70% positive.

UpkeepUpdate frequency

Interactive Minds Solar System ships an update every 2 months, Universe Size Comparison every 4 months. The most recent releases landed on October 21, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
Interactive Minds Solar System versus Universe Size Comparison: the parameters behind the verdict, then further details
ParameterInteractive Minds Solar SystemUniverse Size Comparison
Price$2.99$1.99 — better
Rating5.0 (6 ratings) — better3.1 (29 ratings)
Positive reviews70.4% of reviews — better70.0% of reviews
Number of ratings629 — better
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, Apple TV — better
Requires iOS8.0 — better17.0
Further details — not scored
Size126 MB413 MB
Age rating4++4
DeveloperVosonos LLCDaniele Citi

Customer experience

Interactive Minds Solar System

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews27 reviews
Positive70.4%
Neutral0.0%
Negative29.6%

Universe Size Comparison

All ratings29 ratings
Positive44.8%
Neutral20.7%
Negative34.5%
Written reviews10 reviews
Positive70.0%
Neutral30.0%
Negative0.0%

In-app purchases

None

Interactive Minds Solar System

No in-app purchases

None

Universe Size Comparison

No in-app purchases

Questions

Is Interactive Minds Solar System free?
Interactive Minds Solar System costs $2.99, with no in-app purchases.
Is Universe Size Comparison free?
Universe Size Comparison costs $1.99, with no in-app purchases.
Which has better reviews, Interactive Minds Solar System or Universe Size Comparison?
Interactive Minds Solar System is rated higher. Interactive Minds Solar System averages 5.0 out of 5 from 6 ratings, while Universe Size Comparison averages 3.1 from 29 ratings.
Do Interactive Minds Solar System or Universe Size Comparison have ads?
Neither Interactive Minds Solar System nor Universe Size Comparison shows ads.
Which is updated more often, Interactive Minds Solar System or Universe Size Comparison?
Interactive Minds Solar System ships an update every 2 months, and Universe Size Comparison every 4 months. Most recently, Interactive Minds Solar System was updated on October 21, 2026 and Universe Size Comparison on October 9, 2026.

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