Comparison

Johannes Kepler 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

Johannes Kepler

Features
Read full description

With this app students learn about the life and contributions to astronomy and mathematics made by Johannes Kepler. It discusses his major scientific theories including the application of Kepler's ideas to the understanding of the motion of the planets in our solar system. Johannes Kepler is considered to be one of the greatest astronomers of the seventeenth century. His major breakthrough in defining the mathematics that explains the motion of the planets. He discovered that planets moved in elliptical orbits, not circular as had been believed since the time of Ptolemy. Johannes Kepler was a major figure in the 17th-century scientific revolution Using this app students learn about his amazing accomplishments. It includes introductory information about astronomy. We hope that this app will inspire students to pursue careers in science. Students will enjoy using this graphically illustrated, interactive learning tool. The timeline feature presents key events in the development of our modern understanding of the structure of the solar system. Tapping on timeline points brings up descriptions of historically significant events and the role that Johannes Kepler played. A quiz function helps students demonstrate their comprehension of the reading material. Key scientific and mathematical concepts are shown in colorful illustrations. We hope this app will inspire students to study astronomy. The app shows that Johannes Kepler certainly deserves the place he has earned in the history of science.

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

Intergalactic Solar System3 screens

Verdict

The call

The clearest difference is price: Intergalactic Solar System at Free against Johannes Kepler's $1.99. Intergalactic Solar System also leads on update cadence (monthly vs every 10 months) and iOS requirement (13.0 vs 15.6). Johannes Kepler's advantage is in-app purchases (none vs 1). On 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; Johannes Kepler costs $1.99 up front. Intergalactic Solar System sells 1 one-off in-app purchase. Johannes Kepler asks for nothing beyond the download.

UpkeepUpdate frequency

Johannes Kepler ships an update every 10 months, Intergalactic Solar System monthly. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

Scorecard4 real differences · 6 level
Johannes Kepler versus Intergalactic Solar System: the parameters behind the verdict, then further details
ParameterJohannes KeplerIntergalactic Solar System
Price$1.99Free — better
Rating—4.0 (25 ratings) — better
Positive reviews—70.0% of reviews
Number of ratings—25 — better
Update frequencyEvery 10 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPad, Mac, Apple TViPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size49 MB355 MB
Age rating4+4+
DeveloperVentura Educational SystemsIntergalactic Education LLC

In-app purchases

None

Johannes Kepler

No in-app purchases

1 purchases

Intergalactic Solar System

One-time1
  • Access to Full Game$3.99

Questions

Is Johannes Kepler free?
Johannes Kepler 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.
Do Johannes Kepler or Intergalactic Solar System have ads?
Neither Johannes Kepler nor Intergalactic Solar System shows ads.
Which is updated more often, Johannes Kepler or Intergalactic Solar System?
Johannes Kepler ships an update every 10 months, and Intergalactic Solar System monthly. Most recently, Johannes Kepler was updated on October 24, 2026 and Intergalactic Solar System on October 9, 2026.

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