Celestia vs ClassMadam
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/
ClassMadam
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Classmadam is a smart, easy-to-use communication and academic management app designed specifically for coaching institutes, teachers, students, and parents. The app brings all important classroom updates into one centralized platform, ensuring smooth communication, better organization, and real-time information sharing. With Classmadam, teachers can easily share notes and study materials with students through dedicated streams. Coaching institutes can send notices and announcements, share updates, track fees, manage attendance, handle complaints, and keep everyone informed effortlessly. Students and parents stay connected with classroom activities, schedules, and important announcements anytime, anywhere. Classmadam reduces communication gaps and helps institutes focus more on quality education rather than manual coordination. Whether it’s daily updates, academic records, or important alerts, Classmadam keeps everything simple, transparent, and efficient.
Screenshots
Verdict
The clearest difference is in-app purchases: ClassMadam at none against Celestia's 4. On price, update cadence, ads 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. ClassMadam asks for nothing beyond the download.
Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 20, 2026 and October 5, 2026 respectively.
| Parameter | Celestia | ClassMadam |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (337 ratings) — better | — |
| Positive reviews | 78.9% of reviews | — |
| Number of ratings | 337 — better | — |
| Update frequency | Fortnightly | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 550 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | 林峰 李 | Zaid Rahman |
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
ClassMadam
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
ClassMadam
No in-app purchases









