# Celestia vs Sarah Web AI

The clearest difference is price: Celestia at Free against Sarah Web AI's $0.99. Celestia also leads on iOS requirement (16.0 vs 26.2). Sarah Web AI's advantage is in-app purchases (none vs 4). On ads and device support there is nothing between them.

Celestia is free to download; Sarah Web AI costs $0.99 up front. Celestia sells 4 in-app purchases, starting at $0.99 per 7 days. Sarah Web AI asks for nothing beyond the download.

## The numbers

| Metric | Celestia | Sarah Web AI |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.4 (345 ratings)](https://appshunter.io/ios/app/celestia-space-simulator/id1500434829/reviews)** | — |
| Number of ratings | **345** | — |
| Positive reviews | 78.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Free with in-app purchases | — |
| Size | 550 MB | 6 MB |
| Requires iOS | **16.0** | 26.2 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [林峰 李](https://appshunter.io/developer/1186547508) | [kassem ali](https://appshunter.io/developer/1811205129) |

## What reviewers say

### Celestia

[App page](https://appshunter.io/ios/app/celestia-space-simulator/id1500434829)

Explore the universe in real-time 3D. Visit planets, moons, star clusters, and galaxies, viewing them from any point in space and time. Customize your experience with expandable content and detailed simulations.

**Highlights:** Real-time 3D space visualization, Explore planets, moons, stars, galaxies, Accurate solar system object positions, Interactive planetarium mode, Expandable content with add-ons, Customizable celestial databases

**Features:** Game Controller support, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Celestia PLUS (Weekly) | $0.99 | per 7 days |
| Celestia PLUS (Monthly) | $1.99 | per month |
| Celestia PLUS (Yearly) | $19.99 | per year |
| Celestia PLUS (Lifetime) | $79.99 | one-time |

**What reviewers like**

- ⭐ Realistic space simulation
- 🌌 Ability to explore galaxies and star systems
- 🔍 Detailed planet and moon textures
- 📷 Great for taking screenshots
- 🤖 Reminds users of Space Engine

**What reviewers complain about**

- 🐛 Occasional crashes and glitches
- 🌌 Limited exploration beyond Milky Way and Andromeda
- 🌍 Flat terrain on planets
- 🔍 Lack of detail on some celestial objects
- 🔒 Paywall for some features

**Reported bugs**

- Milky Way and other galaxy textures not loading properly
- Crashes when using certain add-ons
- Issues with planet and moon orbits not being accurate

**Requested features**

- Add more exoplanets and distant star systems
- Implement terrain generation for planets
- Expand to include more galaxies and the overall universe structure
- Add support for black holes, pulsars, and other exotic objects
- Improve controls and camera movement


### Sarah Web AI

[App page](https://appshunter.io/ios/app/sarah-web-ai/id6757011966)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Celestia free?

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

### Is Sarah Web AI free?

Sarah Web AI costs $0.99, with no in-app purchases.

### Do Celestia or Sarah Web AI have ads?

Neither Celestia nor Sarah Web AI 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.*