# Solar System 3D vs Encyclopedia

The clearest difference is update cadence: Solar System 3D at every 2 weeks against Encyclopedia's every 62 months. Solar System 3D also leads on iOS requirement (4.3 vs 15.0). Encyclopedia's advantage is review sentiment (83% vs 68%). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Solar System 3D sells 4 one-off in-app purchases and Encyclopedia sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Encyclopedia holds the better App Store score, 3.8 against 3.6. Both are backed by a comparable volume of ratings — 32 and 14 respectively. Written reviews point the same way: 68% of Solar System 3D's written reviews are positive against 83% of Encyclopedia's.

Solar System 3D ships an update every 2 weeks, Encyclopedia every 62 months. The most recent releases landed on September 29, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Solar System 3D | Encyclopedia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (32 ratings)](https://appshunter.io/ios/app/solar-system-3d/id681687550/reviews) | **[3.8 (14 ratings)](https://appshunter.io/ios/app/encyclopedia-solar-system/id1124568774/reviews)** |
| Number of ratings | **32** | 14 |
| Positive reviews | 67.9% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 62 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 54 MB | 322 MB |
| Requires iOS | **4.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZHIREN GUAN](https://appshunter.io/developer/400879572) | [Good Spider, LLC](https://appshunter.io/developer/1487595667) |

## What reviewers say

### Solar System 3D

[App page](https://appshunter.io/ios/app/solar-system-3d/id681687550)

Explore our solar system in stunning 3D. Navigate through planets, moons, and celestial bodies, accessing detailed Wikipedia information. Experience realistic simulations of Earth's seasons, day-night cycles, and planetary motion.

**Highlights:** 3D space navigation, Full solar system model, Wikipedia information, Spinning and orbiting simulation, Earth's seasonal tilt, Day-night simulation, Real scale factors

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| High Definition Texture | $0.99 | one-time |
| Wallpaper Screenshot | $0.99 | one-time |
| Special Package Offer | $0.99 | one-time |


### 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 |


## Frequently asked questions

### Is Solar System 3D free?

Solar System 3D is free to download, with in-app purchases available.

### Is Encyclopedia free?

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

### Which has better reviews, Solar System 3D or Encyclopedia?

Encyclopedia is rated higher. Solar System 3D averages 3.6 out of 5 from 32 ratings, while Encyclopedia averages 3.8 from 14 ratings.

### Do Solar System 3D or Encyclopedia have ads?

Neither Solar System 3D nor Encyclopedia shows ads.

### Which is updated more often, Solar System 3D or Encyclopedia?

Solar System 3D ships an update every 2 weeks, and Encyclopedia every 62 months. Most recently, Solar System 3D was updated on September 29, 2026 and Encyclopedia on September 17, 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.*