Celestia vs COSMOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Celestia
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.
- 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
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Celestia — real-time 3D visualization of space 3D Space Simulator | Celestia lets you explore our universe in three dimensions. Celestia simulates many different types of celestial objects. From planets and moons to star clusters and galaxies, you can visit every object in the expandable database and view it from any point in space and time. The position and movement of solar system objects is calculated accurately in real time at any rate desired. Interactive Planetarium | Celestia serves as a planetarium – for an observer on any celestial object. You can easily navigate to any world and land on its surface. When used as a planetarium, Celestia shows accurate positions of solar system objects in the sky. You can switch labels and other supporting features on and off with hotkeys, or zoom in and out on an object of interest, for example Jupiter’s system of moons. Expandable Content | Customize Celestia according to your needs. Celestia’s catalogues can be easily expanded. There are many different add-ons available containing new objects like comets or stars, high-resolution textures of Earth and other well mapped solar system bodies, as well as 3D models for asteroids and spacecraft on precise trajectories. Even fictional objects from well-known sci-fi franchises can be found. EULA(End User License Agreement): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
COSMOS
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Explore the universe from the palm of your hand. COSMOS is a space exploration app that takes you on an immersive journey through the solar system, distant galaxies, black holes, asteroid belts, and dwarf planets - all with stunning visuals and real astronomical data. EXPLORE 5 COSMIC REGIONS Milky Way - FREE Start your journey in our home solar system. Visit all 8 planets, 13 moons, and the Sun. Tap any world to discover facts, stunning imagery, and take a quiz to test your knowledge. Andromeda Travel 2.5 million light years to our nearest spiral galaxy. Explore 5 deep-space objects including satellite galaxies M32 & M110 and the supermassive black hole at its core. Black Holes Confront the most extreme objects in the universe. From Sagittarius A* at the heart of our galaxy to M87* - the first black hole ever photographed. Asteroids Journey through the asteroid belt between Mars and Jupiter. Meet Vesta, Bennu, Ryugu, Psyche and other rocky relics from the early Solar System. Dwarf Planets Venture beyond Neptune to discover Pluto, Eris, Haumea, Makemake, and Ceres - worlds too small to be planets, too fascinating to ignore. LEARN AS YOU EXPLORE Every object comes with detailed facts and a built-in quiz. Test yourself on difficulty levels from Quick to Expert and earn badges as you master the cosmos. 13 BADGES TO EARN Track your progress and unlock achievement badges as you explore each region. Can you earn the ultimate "Universe Mapped" badge by visiting every object? PRIVACY FIRST No account required. No ads. No tracking. All your progress is stored locally on your device. COSMOS PREMIUM Unlock all 4 premium regions with a single one-time purchase. No subscription, no hidden fees - pay once, explore forever. Start your journey today. The universe is waiting. Privacy Policy: https://clkcompany.github.io/cosmosapp/privacy-policy.html Terms of Service: https://clkcompany.github.io/cosmosapp/terms-of-service.html License Agreement (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Contact: tech@clk.company
Screenshots
Verdict
The clearest difference is iOS requirement: COSMOS at 13.0 against Celestia's 16.0. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Celestia sells 4 in-app purchases, starting at $0.99 per 7 days and COSMOS sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Celestia | COSMOS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (337 ratings) — better | — |
| Positive reviews | 78.9% of reviews | — |
| Number of ratings | 337 — better | — |
| Update frequency | Fortnightly | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPod |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 550 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | 林峰 李 | Muhammed Celik |
Bugs and requests
Celestia
Reported bugs
3 issues- 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
5 requests- 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
COSMOS
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Celestia
- Celestia PLUS (Weekly)7 Days trial$0.997 Days
- Celestia PLUS (Monthly)$1.991 Month
- Celestia PLUS (Yearly)$19.991 Year
- Celestia PLUS (Lifetime)$79.99
COSMOS
- COSMOS Premium$4.99









