# Encyclopedia vs Solar System AR 4D

The clearest difference is iOS requirement: Solar System AR 4D at 12.0 against Encyclopedia's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Encyclopedia ships an update every 62 months, Solar System AR 4D every 46 months. The most recent releases landed on September 3, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Encyclopedia | Solar System AR 4D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (14 ratings)](https://appshunter.io/ios/app/encyclopedia-solar-system/id1124568774/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 62 months | **Every 46 months** |
| Monetization | Free with in-app purchases | — |
| Size | 322 MB | 122 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Good Spider, LLC](https://appshunter.io/developer/1487595667) | [Ibrahim Amer](https://appshunter.io/developer/1054899889) |

## 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 |


### Solar System AR 4D

[App page](https://appshunter.io/ios/app/solar-system-ar-4d/id1593970513)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock | $5.99 | one-time |


## Frequently asked questions

### Is Encyclopedia free?

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

### Is Solar System AR 4D free?

Solar System AR 4D is free to download, with in-app purchases available.

### Do Encyclopedia or Solar System AR 4D have ads?

Neither Encyclopedia nor Solar System AR 4D shows ads.

### Which is updated more often, Encyclopedia or Solar System AR 4D?

Encyclopedia ships an update every 62 months, and Solar System AR 4D every 46 months. Most recently, Encyclopedia was updated on September 3, 2026 and Solar System AR 4D on September 18, 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.*