Comparison

Universe Size Comparison vs Intergalactic Solar System

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
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.

About

Intergalactic Solar System

Explore planets, moons, and countries in this space simulator mini-game. Learn astronomy and geography aligned with next-generation science standards. Discover the Milky Way galaxy and assess your knowledge through engaging gameplay.

Highlights
  • Planet and moon exploration
  • Country geography learning
  • Milky Way galaxy view
  • Common Core aligned curriculum
  • Proficiency assessment
  • Engaging gameplay levels
Features
Read full description

Intergalactic Education introduces Intergalactic Solar System, a mini-game that teaches about planets, moons, and countries. This space simulator lets you explore celestial bodies from the viewpoint of space itself. The latest edition adds the Milky Way as an observable galaxy. Intergalactic Solar System uses next generation science standards (Common Core aligned) astronomy and geography. (Follows standards ESS1.A, ESS1.B, and CCSS.ELA-LITERACY.RH.6-8.7) Try Intergalactic Solar System! Assess proficiency in Solar System knowledge according to educational standards. Rewarding levels of gameplay maintain engagement. You will forget you were doing astronomy and geography!

Screenshots

Universe Size Comparison4 screens
Intergalactic Solar System3 screens

Verdict

The call

The clearest difference is price: Intergalactic Solar System at Free against Universe Size Comparison's $1.99. Intergalactic Solar System also leads on rating (4.0 vs 3.2) and update cadence (monthly vs every 3 months). Universe Size Comparison's advantage is in-app purchases (none vs 1). On review sentiment, ratings volume, ads and device support 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

Intergalactic Solar System is free to download; Universe Size Comparison costs $1.99 up front. Intergalactic Solar System sells 1 one-off in-app purchase. Universe Size Comparison asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Intergalactic Solar System holds the better App Store score, 4.0 against 3.2. Both are backed by a comparable volume of ratings — 30 and 25 respectively. Written reviews split almost evenly too, at 70% and 70% positive.

UpkeepUpdate frequency

Universe Size Comparison ships an update every 3 months, Intergalactic Solar System monthly. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

Scorecard6 real differences · 4 level
Universe Size Comparison versus Intergalactic Solar System: the parameters behind the verdict, then further details
ParameterUniverse Size ComparisonIntergalactic Solar System
Price$1.99Free — better
Rating3.2 (30 ratings)4.0 (25 ratings) — better
Positive reviews70.0% of reviews70.0% of reviews
Number of ratings30 — better25
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, Apple TViPhone, iPad, iPod
Requires iOS17.013.0 — better
Further details — not scored
Size411 MB355 MB
Age rating+44+
DeveloperDaniele CitiIntergalactic Education LLC

Customer experience

Universe Size Comparison

All ratings30 ratings
Positive46.7%
Neutral20.0%
Negative33.3%
Written reviews10 reviews
Positive70.0%
Neutral30.0%
Negative0.0%

Intergalactic Solar System

All ratings20 ratings
Positive75.0%
Neutral5.0%
Negative20.0%
Written reviews10 reviews
Positive70.0%
Neutral10.0%
Negative20.0%

In-app purchases

None

Universe Size Comparison

No in-app purchases

1 purchases

Intergalactic Solar System

One-time1
  • Access to Full Game$3.99

Questions

Is Universe Size Comparison free?
Universe Size Comparison costs $1.99, with no in-app purchases.
Is Intergalactic Solar System free?
Intergalactic Solar System is free to download, with in-app purchases available.
Which has better reviews, Universe Size Comparison or Intergalactic Solar System?
Intergalactic Solar System is rated higher. Universe Size Comparison averages 3.2 out of 5 from 30 ratings, while Intergalactic Solar System averages 4.0 from 25 ratings.
Do Universe Size Comparison or Intergalactic Solar System have ads?
Neither Universe Size Comparison nor Intergalactic Solar System shows ads.
Which is updated more often, Universe Size Comparison or Intergalactic Solar System?
Universe Size Comparison ships an update every 3 months, and Intergalactic Solar System monthly. Most recently, Universe Size Comparison was updated on October 25, 2026 and Intergalactic Solar System on October 9, 2026.

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