Solar Book vs Intergalactic Solar System
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solar Book
This app provides detailed information about solar eclipses, including timings for different phases based on your location. It allows you to view sequential images and star charts for planning and observation.
- Solar eclipse phase timing
- Location-based eclipse calculations
- Sequential eclipse image display
- Star chart visualization
- Past and future eclipse planning
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The Solar Book is an app for smart-phones and tablets for a solar eclipse. The Solar Book shows at what time each portion of the Sun is covered by the Moon during a solar eclipse. The beginning time of a solar eclipse, time of the maximum phase of the solar eclipse and the ending time of the solar eclipse will change depending on the location of your observing area. The Solar Book will show you the eclipse phases at your location. Your location for observing the solar eclipse can be designated with use of the location setup dialog box. This allows you to plan in advance the progression of the eclipse. Sequential images of the solar eclipse will be displayed in the appropriate order when you tap on the eclipse thumbnail images icon on the lower right of the screen. Solar eclipses can be displayed by designating the date of a solar eclipse in the past or the future if you cannot find it in a list of the selection. The Solar Book will show you a star chart of the sky at your place of observation if the solar eclipse is not selected.
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 rating: Solar Book at 4.7 against Intergalactic Solar System's 4.0. Solar Book also leads on in-app purchases (none vs 1). Intergalactic Solar System's advantage is update cadence (monthly vs every 14 months) and ratings volume (25 vs 3). On price, ads, device support and iOS requirement 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
Both are free to download. Intergalactic Solar System sells 1 one-off in-app purchase. Solar Book asks for nothing beyond the download.
Solar Book holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Intergalactic Solar System has 25 ratings behind it against 3, so its average is the more settled of the two.
Solar Book ships an update every 14 months, Intergalactic Solar System monthly. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.
| Parameter | Solar Book | Intergalactic Solar System |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | 4.0 (25 ratings) |
| Positive reviews | — | 70.0% of reviews |
| Number of ratings | 3 | 25 — better |
| Update frequency | Every 14 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 5 MB | 355 MB |
| Age rating | 4+ | 4+ |
| Developer | Vixen Co.,Ltd. | Intergalactic Education LLC |
Customer experience
Solar Book
Intergalactic Solar System
In-app purchases
Solar Book
No in-app purchases
Intergalactic Solar System
- Access to Full Game$3.99
Questions
Is Solar Book free?
Is Intergalactic Solar System free?
Which has better reviews, Solar Book or Intergalactic Solar System?
Do Solar Book or Intergalactic Solar System have ads?
Which is updated more often, Solar Book or Intergalactic Solar System?
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