# Celestial Simulation vs iFox Observatory

The clearest difference is price: iFox Observatory at Free against Celestial Simulation's $3.99. iFox Observatory also leads on iOS requirement (15.1 vs 18.5). On ads, in-app purchases and device support there is nothing between them.

iFox Observatory is free to download; Celestial Simulation costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Celestial Simulation | iFox Observatory |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 88 MB | 37 MB |
| Requires iOS | 18.5 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dung Le](https://appshunter.io/developer/1850828414) | [宁 王](https://appshunter.io/developer/431513082) |

## What reviewers say

### Celestial Simulation

[App page](https://appshunter.io/ios/app/celestial-simulation/id6756852871)

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

**In-app purchases:** none


### iFox Observatory

[App page](https://appshunter.io/ios/app/ifox-observatory/id6772693497)

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

**In-app purchases:** none


## Frequently asked questions

### Is Celestial Simulation free?

Celestial Simulation costs $3.99, with no in-app purchases.

### Is iFox Observatory free?

iFox Observatory is free to download, with no in-app purchases.

### Do Celestial Simulation or iFox Observatory have ads?

Neither Celestial Simulation nor iFox Observatory 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.*