Stars Units Sizes Objects vs Orbital Simulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stars Units Sizes Objects
Explore the vastness of the universe, from the smallest particles to the largest cosmic structures. Compare object sizes, view detailed images, and perform unit conversions across a wide range of astronomical scales. Learn about stars, galaxies, and the incredible distances between them.
- Compare object sizes
- View object images
- Pinch/Zoom and Pan images
- Unit conversion for distances
- Explore scales from Planck length to observable universe
- Learn about stars and galaxies
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Size of the smallest to largest objects and stars. Compare the size of objects in the universe. Object images. Pinch/Zoom image. Pan/Move image. Rotate image. Double tap to reset an image. From the smallest to the largest one. From planck length to observable universe. From Yoctometre, Zeptometre, Attometre, Femtometre, Picometre, Nanometre, Micro, Millimetre, Centimetre, Metre, KiloMetre, Lightyear, Parsecs, Billion Lightyears to 93 Billion Lightyears. Size of objects, particles, atoms, cells, stars and galaxies. Get to know the stars. Get to know the spaces. get to know the universe. How small is this world. How big is the universe. And How great is the creator. How far is the star distance from earth. Two way 18 distance unit conversion. planck length, yoctometer, zeptometer, attometer, femtometer, picometre, nanometre, micrometre, Millimeter, Centimeter, Meter, Kilometer, Inch, Foot, Mile, Astronomical, Lightyear, Parsecs. Perform auto conversion when picker is changed. Share conversion result. Reset unit convertor.
Orbital Simulator
Explore orbital mechanics through interactive simulations and real-time solar system data. Learn about Kepler's Laws, practice orbital maneuvers, and engage in mission objectives. Ideal for students and space enthusiasts.
- Interactive orbital simulations
- Kepler's Laws visualization
- Orbital maneuver practice
- Real-time solar system view
- Customizable orbital parameters
- Detailed educational content
- Mission-based challenges
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Embark on an interactive journey through space with Orbital Simulator: Explore. This comprehensive app is designed to educate and engage users of all levels, from space enthusiasts to students, offering a deep dive into the fascinating world of orbital mechanics. Key Features: Interactive Simulations: Experiment with circular, elliptical, and hyperbolic orbits. See how changing parameters like semi-major axis, eccentricity, and inclination affect trajectories. Kepler’s Laws: Visualize and understand Kepler’s three laws of planetary motion with clear, interactive simulations. Orbital Maneuvers: Practice key maneuvers such as Hohmann transfers, Lambert transfers, and circularizations. Learn how these maneuvers are used in real space missions. Real-Time Solar System: View real-time positions of planets and moons within our solar system. Understand how celestial bodies interact and move over time. Customizable Parameters: Adjust orbital parameters and see the immediate effects on your spacecraft's trajectory. Experiment with different scenarios and learn through hands-on experience. Educational Content: Access detailed explanations, tutorials, and guides designed to enhance your understanding of space mechanics and celestial navigation. Dynamic Environment: Navigate complex gravitational fields in various scenarios, including binary star systems and multi-body interactions. Mission Objectives: Engage in missions that challenge you to establish orbits, perform transfers, and navigate through dynamic environments. Each mission helps you apply theoretical knowledge to practical scenarios. Visual Trajectory Paths: Visualize the path of your spacecraft with real-time trajectory lines. Understand the impact of your maneuvers and improve your navigation skills. Why Choose Orbital Simulator: Explore? For Space Enthusiasts and Students: Whether you’re a budding astronomer or a seasoned space enthusiast, this app offers valuable insights and engaging content for all levels. Educational Tool: Ideal for classroom settings or individual study, providing interactive and immersive learning experiences. User-Friendly Interface: Intuitive controls and clear visuals make it easy to understand complex concepts. Constant Updates: We continuously update the app with new features, scenarios, and educational content to keep your learning experience fresh and relevant. Download Orbital Simulator: Explore now and embark on your journey through the stars. Master the art of orbital mechanics, explore the intricacies of celestial navigation, and experience the wonder of the cosmos. Join a community of space enthusiasts and students who are exploring the universe, one orbit at a time. Ready to become an orbital mechanic? Your adventure starts here!
Screenshots
Verdict
The clearest difference is rating: Orbital Simulator at 5.0 against Stars Units Sizes Objects's 4.2. Orbital Simulator also leads on update cadence (fortnightly vs every 4 months). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Orbital Simulator holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 5 and 5 respectively.
Stars Units Sizes Objects ships an update every 4 months, Orbital Simulator fortnightly. The most recent releases landed on September 7, 2026 and July 8, 2026 respectively.
| Parameter | Stars Units Sizes Objects | Orbital Simulator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 5 | 5 |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 124 MB | 247 MB |
| Age rating | 4+ | 17+ |
| Developer | Mudarmeen Munlin | Renzo Macedo |
Customer experience
Stars Units Sizes Objects
Orbital Simulator
In-app purchases
Stars Units Sizes Objects
No in-app purchases
Orbital Simulator
No in-app purchases
Questions
Is Stars Units Sizes Objects free?
Is Orbital Simulator free?
Which has better reviews, Stars Units Sizes Objects or Orbital Simulator?
Do Stars Units Sizes Objects or Orbital Simulator have ads?
Which is updated more often, Stars Units Sizes Objects or Orbital Simulator?
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