Comparison

SystemeSolaire 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

SystemeSolaire

Features
Read full description

The solar system is our planetary system, composed of a star, the Sun, and the defined celestial bodies orbiting it: the eight confirmed planets and their 175 known natural satellites, the five dwarf planets and the billions of small bodies and belts. This application puts the solar system at your fingertips. Click on a star or spacecraft to see its detailed information and a selection of videos chosen to shed light on important topics related to that star or spacecraft. This application is a concentrate of scientific knowledge of each celestial body of our solar system. This information is intended for a wide audience and no previous experience/knowledge is necessary. Are you curious? Well, you will be served. Do not hesitate to recommend this to your children, parents, friends, grandparents. There is something for everyone.

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

SystemeSolaire4 screens
Universe Size Comparison4 screens

Verdict

The call

The clearest difference is update cadence: Universe Size Comparison at every 3 months against SystemeSolaire's every 55 months. SystemeSolaire's advantage is iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases 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

SystemeSolaire 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

SystemeSolaire ships an update every 55 months, Universe Size Comparison every 3 months. The most recent releases landed on October 28, 2026 and November 3, 2026 respectively.

Scorecard2 real differences · 8 level
SystemeSolaire versus Universe Size Comparison: the parameters behind the verdict, then further details
ParameterSystemeSolaireUniverse Size Comparison
Price$1.99$1.99
Rating—3.2 (30 ratings) — better
Positive reviews—70.0% of reviews
Number of ratings—30 — better
Update frequencyEvery 55 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPodiPhone, iPad, Apple TV
Requires iOS15.6 — better17.0
Further details — not scored
Size596 MB411 MB
Age rating4++4
DeveloperNMS Narcisse Mavoha Solutions SarlDaniele Citi

In-app purchases

None

SystemeSolaire

No in-app purchases

None

Universe Size Comparison

No in-app purchases

Questions

Is SystemeSolaire free?
SystemeSolaire 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 SystemeSolaire or Universe Size Comparison have ads?
Neither SystemeSolaire nor Universe Size Comparison shows ads.
Which is updated more often, SystemeSolaire or Universe Size Comparison?
SystemeSolaire ships an update every 55 months, and Universe Size Comparison every 3 months. Most recently, SystemeSolaire was updated on October 28, 2026 and Universe Size Comparison on November 3, 2026.

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