# Encyclopedia vs Intergalactic Solar System

The clearest difference is update cadence: Intergalactic Solar System at monthly against Encyclopedia's every 62 months. Intergalactic Solar System also leads on rating (4.0 vs 3.8) and iOS requirement (13.0 vs 15.0). Encyclopedia's advantage is review sentiment (83% vs 70%). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Encyclopedia sells 1 one-off in-app purchase and Intergalactic Solar System sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Intergalactic Solar System holds the better App Store score, 4.0 against 3.8. Both are backed by a comparable volume of ratings — 14 and 25 respectively. Written reviews complicate that: 83% of Encyclopedia's written reviews are positive against 70% of Intergalactic Solar System's, so the app with the better star average is not the one people write more warmly about.

Encyclopedia ships an update every 62 months, Intergalactic Solar System monthly. The most recent releases landed on September 3, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Encyclopedia | Intergalactic Solar System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (14 ratings)](https://appshunter.io/ios/app/encyclopedia-solar-system/id1124568774/reviews) | **[4.0 (25 ratings)](https://appshunter.io/ios/app/intergalactic-solar-system/id1505399254/reviews)** |
| Number of ratings | 14 | **25** |
| Positive reviews | **83.3% of reviews** | 70.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 62 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 322 MB | 355 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Good Spider, LLC](https://appshunter.io/developer/1487595667) | [Intergalactic Education LLC](https://appshunter.io/developer/1364648815) |

## What reviewers say

### Encyclopedia

[App page](https://appshunter.io/ios/app/encyclopedia-solar-system/id1124568774)

Explore the solar system with extensive articles and high-definition images. This app offers comprehensive information, engaging content, and a user-friendly interface, making it suitable for both children and adults interested in space.

**Highlights:** Thousands of articles and HD photos, Comprehensive solar system information, Engaging and easy-to-understand content, Offline availability, Badge collection for reading, Intuitive user interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


### Intergalactic Solar System

[App page](https://appshunter.io/ios/app/intergalactic-solar-system/id1505399254)

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:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access to Full Game | $3.99 | one-time |


## Frequently asked questions

### Is Encyclopedia free?

Encyclopedia is free to download, with in-app purchases available.

### Is Intergalactic Solar System free?

Intergalactic Solar System is free to download, with in-app purchases available.

### Which has better reviews, Encyclopedia or Intergalactic Solar System?

Intergalactic Solar System is rated higher. Encyclopedia averages 3.8 out of 5 from 14 ratings, while Intergalactic Solar System averages 4.0 from 25 ratings.

### Do Encyclopedia or Intergalactic Solar System have ads?

Neither Encyclopedia nor Intergalactic Solar System shows ads.

### Which is updated more often, Encyclopedia or Intergalactic Solar System?

Encyclopedia ships an update every 62 months, and Intergalactic Solar System monthly. Most recently, Encyclopedia was updated on September 3, 2026 and Intergalactic Solar System on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*