Comparison

NASA HIAD vs Orbital Simulator

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

Head to head
About

NASA HIAD

Engage in a challenging space mission simulation where you must guide an inflatable spacecraft through atmospheric re-entry. Make critical decisions about shape, materials, and trajectory to successfully land cargo on Earth.

Highlights
  • Spacecraft re-entry simulation
  • Inflatable aerodynamic decelerator mechanics
  • Trajectory and speed control
  • Vehicle customization
  • Four levels of engineering challenges
  • Star-based scoring system
Features
Read full description

A giant cone of inner tubes stacked together may someday help cargo, or even people, land on another planet or return to Earth. NASA calls the spacecraft technology HIAD - Hypersonic Inflatable Aerodynamic Decelerator. Learn the challenges NASA faces as it works to develop an inflatable spacecraft. Choose the right shape, materials and trajectory to use a HIAD to bring cargo back from space. To successfully guide an inflatable spacecraft through the super heat of atmospheric re-entry requires the right stuff. If you inflate too early, your shape is incorrect or your material isn’t strong enough - you burn up. And if you get all that right and miss the target the mission is a bust. Try your hand at landing a HIAD and become a rocket scientist. Advance through all stages at each of the four levels, collecting up to three stars for each successful landing. The HIAD game challenges players to successfully land a HIAD after launching from the International Space Station and arriving at a target ground point on Earth. To successfully reach the target, players must: •Undock from the ISS and use thruster control to steer the spacecraft towards the desired de-orbit point •Inflate the HIAD aeroshell to reduce velocity and protect the payload from the heat of atmospheric re-entry •Steer the inflated HIAD to the ground target prior to parachute deployment, taking into account the prevailing winds •Customize the HIAD vehicle to achieve different performance characteristics to improve results FEATURES •Multiple spacecraft configurations and options •Speed and trajectory controls •In-game introduction •Four levels of engineering mastery •Locked levels •Scoring for each level •Help section •Links to related website

About

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.

Highlights
  • Interactive orbital simulations
  • Kepler's Laws visualization
  • Orbital maneuver practice
  • Real-time solar system view
  • Customizable orbital parameters
  • Detailed educational content
  • Mission-based challenges
Features
Read full description

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

NASA HIAD4 screens
Orbital Simulator4 screens

Verdict

The call

The clearest difference is rating: Orbital Simulator at 5.0 against NASA HIAD's 4.4. Orbital Simulator also leads on update cadence (fortnightly vs every 4 months). NASA HIAD's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Orbital Simulator holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 8 and 6 respectively.

UpkeepUpdate frequency

NASA HIAD ships an update every 4 months, Orbital Simulator fortnightly. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

Scorecard5 real differences · 5 level
NASA HIAD versus Orbital Simulator: the parameters behind the verdict, then further details
ParameterNASA HIADOrbital Simulator
PriceFreeFree
Rating4.4 (8 ratings)5.0 (6 ratings) — better
Positive reviews38.1% of reviews—
Number of ratings8 — better6
Update frequencyEvery 4 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS5.1.1 — better12.0
Further details — not scored
Size25 MB247 MB
Age rating4+17+
DeveloperNASARenzo Macedo

Customer experience

NASA HIAD

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews21 reviews
Positive38.1%
Neutral4.8%
Negative57.1%

Orbital Simulator

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

NASA HIAD

No in-app purchases

None

Orbital Simulator

No in-app purchases

Questions

Is NASA HIAD free?
NASA HIAD is free to download, with no in-app purchases.
Is Orbital Simulator free?
Orbital Simulator is free to download, with no in-app purchases.
Which has better reviews, NASA HIAD or Orbital Simulator?
Orbital Simulator is rated higher. NASA HIAD averages 4.4 out of 5 from 8 ratings, while Orbital Simulator averages 5.0 from 6 ratings.
Do NASA HIAD or Orbital Simulator have ads?
Orbital Simulator shows ads; NASA HIAD does not.
Which is updated more often, NASA HIAD or Orbital Simulator?
NASA HIAD ships an update every 4 months, and Orbital Simulator fortnightly. Most recently, NASA HIAD was updated on October 23, 2026 and Orbital Simulator on October 22, 2026.

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