Johannes Kepler vs Intergalactic Solar System
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Johannes Kepler
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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.
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.
- Planet and moon exploration
- Country geography learning
- Milky Way galaxy view
- Common Core aligned curriculum
- Proficiency assessment
- Engaging gameplay levels
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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
Verdict
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
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.
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.
| Parameter | Johannes Kepler | Intergalactic Solar System |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 4.0 (25 ratings) — better |
| Positive reviews | — | 70.0% of reviews |
| Number of ratings | — | 25 — better |
| Update frequency | Every 10 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPad, Mac, Apple TV | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 49 MB | 355 MB |
| Age rating | 4+ | 4+ |
| Developer | Ventura Educational Systems | Intergalactic Education LLC |
In-app purchases
Johannes Kepler
No in-app purchases
Intergalactic Solar System
- Access to Full Game$3.99
Questions
Is Johannes Kepler free?
Is Intergalactic Solar System free?
Do Johannes Kepler or Intergalactic Solar System have ads?
Which is updated more often, Johannes Kepler or Intergalactic Solar System?
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