# Cool Astronomy Facts vs Alien Planets

The clearest difference is price: Cool Astronomy Facts at $1.99 against Alien Planets's $9.99. Cool Astronomy Facts also leads on chart position (#192 vs unranked) and iOS requirement (11.0 vs 27.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Cool Astronomy Facts costs $1.99 and Alien Planets $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Cool Astronomy Facts ships an update every 37 months, Alien Planets every 24 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Cool Astronomy Facts | Alien Planets |
| --- | --- | --- |
| Price | **$1.99** | $9.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cool-astronomy-facts/id878548101/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 24 months** |
| Monetization | Paid | — |
| Best chart rank | **#192** | — |
| Size | 24 MB | 51 MB |
| Requires iOS | **11.0** | 27.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Coskun CAKIR](https://appshunter.io/developer/482066275) | [Jose Leal](https://appshunter.io/developer/1441468562) |

## What reviewers say

### Cool Astronomy Facts

[App page](https://appshunter.io/ios/app/cool-astronomy-facts/id878548101)

**Currently charting:** #192 Top Paid · Education (US App Store)

Discover mind-blowing astronomy and space facts across 17 categories. Improve your knowledge with offline access to around 400 facts, easily searchable and shareable. Customize your reading experience with adjustable font sizes and view options.

**Highlights:** Offline access, 17 astronomy categories, 400+ astronomy facts, Searchable facts, Favorite facts, Share facts, Adjustable font size

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

**In-app purchases:** none


### Alien Planets

[App page](https://appshunter.io/ios/app/alien-planets/id1478121868)

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

**In-app purchases:** none


## Frequently asked questions

### Is Cool Astronomy Facts free?

Cool Astronomy Facts costs $1.99, with no in-app purchases.

### Is Alien Planets free?

Alien Planets costs $9.99, with no in-app purchases.

### Do Cool Astronomy Facts or Alien Planets have ads?

Neither Cool Astronomy Facts nor Alien Planets shows ads.

### Which is updated more often, Cool Astronomy Facts or Alien Planets?

Cool Astronomy Facts ships an update every 37 months, and Alien Planets every 24 months. Most recently, Cool Astronomy Facts was updated on November 6, 2026 and Alien Planets on November 3, 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.*