# Encyclopedia of Outer Space vs Deep Space Science

The clearest difference is in-app purchases: Deep Space Science at none against Encyclopedia of Outer Space's 3. Deep Space Science also leads on iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Encyclopedia of Outer Space sells 3 in-app purchases, starting at $2.99 per month. Deep Space Science asks for nothing beyond the download.

## The numbers

| Metric | Encyclopedia of Outer Space | Deep Space Science |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (13 ratings)](https://appshunter.io/ios/app/encyclopedia-of-outer-space/id1122571537/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 644 MB | 22 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Good Spider, LLC](https://appshunter.io/developer/1487595667) | [WingYeung Ma](https://appshunter.io/developer/1790034550) |

## What reviewers say

### Encyclopedia of Outer Space

[App page](https://appshunter.io/ios/app/encyclopedia-of-outer-space/id1122571537)

An offline encyclopedia with thousands of articles and HD photos covering all aspects of outer space. Earn badges for reading and explore topics from A-Z with a simple, elegant interface.

**Highlights:** Thousands of articles and HD photos, Comprehensive outer space information, Simple organization and UI, Offline access, Badge collection for reading, Available on iPhone and iPad

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Annual Premium | $19.99 | per year |
| Full Version | $9.99 | one-time |


### Deep Space Science

[App page](https://appshunter.io/ios/app/deep-space-science/id6758235431)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Encyclopedia of Outer Space free?

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

### Is Deep Space Science free?

Deep Space Science is free to download, with no in-app purchases.

### Do Encyclopedia of Outer Space or Deep Space Science have ads?

Neither Encyclopedia of Outer Space nor Deep Space Science shows ads.

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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.*