# Celestial Simulation vs NightSkyLog

The clearest difference is price: NightSkyLog at Free against Celestial Simulation's $3.99. Celestial Simulation's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

NightSkyLog is free to download; Celestial Simulation costs $3.99 up front. NightSkyLog sells 1 one-off in-app purchase. Celestial Simulation asks for nothing beyond the download.

## The numbers

| Metric | Celestial Simulation | NightSkyLog |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Size | 88 MB | 5 MB |
| Requires iOS | 18.5 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dung Le](https://appshunter.io/developer/1850828414) | [InnovaLabWorks](https://appshunter.io/developer/1888514726) |

## 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


### NightSkyLog

[App page](https://appshunter.io/ios/app/nightskylog-stargazing/id6790140311)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NightSkyLog Lifetime | $12.99 | one-time |


## Frequently asked questions

### Is Celestial Simulation free?

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

### Is NightSkyLog free?

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

### Do Celestial Simulation or NightSkyLog have ads?

Neither Celestial Simulation nor NightSkyLog 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.*