Comparison

Celestial Simulation vs Astrarium Sky Map

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Celestial Simulation

Features
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Celestial Simulation Experience the universe as it truly moves. Celestial Simulation is a high-fidelity, physics-based app that lets you explore and understand celestial motion through real simulations—not animations or guesses. Every event is driven by time, location, and real celestial mechanics. From eclipses and planetary motion to lunar occultations and chaotic three-body dynamics, the app turns complex astronomy into intuitive, visual experiences. Observer-Based Simulation Your location matters. Set your observing position on Earth and watch how celestial events change with latitude, longitude, and time. Every simulation adapts instantly to your chosen place and moment. Solar System Geometry Explore the mechanics of the inner solar system: - Annular and hybrid solar eclipses with umbra and antumbra geometry - Planetary conjunctions and minimum angular separations - Mercury and Venus elongations for optimal visibility - Retrograde motion visualized over days and weeks - Transits of Mercury and Venus across the solar disk Most simulations are continuous and time-accurate. Lunar Occultations See how the Moon moves through the sky: - Occultations of bright stars and planets - Local and global visibility bands - Geometry that explains why an event is visible from certain locations Three-Body Dynamics Go beyond classical orbits and explore real gravitational complexity: - Circular Restricted Three-Body Problem (CR3BP) - Lagrange points L1–L5 with stability insights - Chaotic motion in non-rotating frames - Extreme sensitivity to initial conditions - These simulations reveal how real spaceflight dynamics and celestial chaos work. Special Focus: Total Solar Eclipse 2026 (Europe) A total solar eclipse will cross Europe in 2026 — a rare and unforgettable event. Celestial Simulation lets you explore the full path of totality, simulate eclipse geometry from different locations, and understand how timing and position affect what you will see. Use the simulation to: - Compare observing locations across Europe - Visualize eclipse paths and shadow motion - Plan where and when to experience totality Whether you are preparing a journey or simply exploring the mechanics behind the event, the app helps you understand why the eclipse unfolds the way it does. Built for Exploration - Interactive time control - Clean, focused visualizations - Designed for learners, enthusiasts, and curious minds - No clutter, no gimmicks—just the universe in motion Celestial Simulation is a pocket laboratory for understanding how the sky actually works. Whether you’re learning, teaching, or simply fascinated by celestial mechanics, this app lets you see the physics behind the beauty.

About

Astrarium Sky Map

Features
Read full description

Astrariūm is a beautiful astronomy guide for planning what to see in the night sky. Explore a live sky map, follow upcoming sky events, learn constellations, and save your favorite objects for later. Whether you are watching the Moon, tracking planets, learning bright constellations, or planning a quiet stargazing session, Astrariūm helps make the sky easier to understand. Features: Live Sky Map Navigate stars, constellations, planets, and deep-sky objects with an interactive sky view. Tonight’s Sky See useful observing ideas for the current night, including Moon details, highlights, and seasonal suggestions. Sky Calendar Follow upcoming astronomy events such as moon phases, meteor activity, planet highlights, and special sky moments. Featured Guides Learn about constellations and celestial objects through short, visual guides made for casual sky watchers. Saved Sky Keep favorite objects ready so you can return to them during your next observing session. Astrariūm is designed for beginners, astronomy lovers, and anyone who wants a calmer, more visual way to explore the night sky. Privacy Policy: https://nhantran2112.github.io/astrarium-sky-map/privacy-policy.html Terms of Use: https://nhantran2112.github.io/astrarium-sky-map/terms-of-use.html

Screenshots

Celestial Simulation4 screens
Astrarium Sky Map4 screens

Verdict

The call

The clearest difference is price: Astrarium Sky Map at Free against Celestial Simulation's $3.99. Celestial Simulation's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Astrarium Sky Map is free to download; Celestial Simulation costs $3.99 up front. Astrarium Sky Map sells 3 in-app purchases, starting at $3.99 per 7 days. Celestial Simulation asks for nothing beyond the download.

Scorecard2 real differences · 4 level
Celestial Simulation versus Astrarium Sky Map: the parameters behind the verdict, then further details
ParameterCelestial SimulationAstrarium Sky Map
Price$3.99Free — better
Update frequency—Every 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.517.0 — better
Further details — not scored
Size88 MB195 MB
Age rating4+4+
DeveloperDung LeNhan Tran

In-app purchases

None

Celestial Simulation

No in-app purchases

3 purchases

Astrarium Sky Map

Subscriptions2
  • Weekly$3.997 Days
  • Yearly$14.991 Year
One-time1
  • Onetime$34.99

Questions

Is Celestial Simulation free?
Celestial Simulation costs $3.99, with no in-app purchases.
Is Astrarium Sky Map free?
Astrarium Sky Map is free to download, with in-app purchases available.
Do Celestial Simulation or Astrarium Sky Map have ads?
Neither Celestial Simulation nor Astrarium Sky Map shows ads.

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