Isotopolis vs Spaceflight Simulator
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Isotopolis
Explore particle physics by accelerating, steering, and colliding particles to create new isotopes. Learn about the fragmentation process and the table of nuclides through engaging gameplay. This educational game is developed by scientists and students.
- Particle acceleration and steering
- Isotope creation and discovery
- Learn about fragmentation process
- Explore the table of nuclides
- Educational gameplay
- Developed by scientists and students
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Accelerate, steer, and collide particles to make new and rare isotopes in this game from the National Superconducting Cyclotron Laboratory and the Games for Entertainment & Learning Lab at Michigan State University. Players will guide particles through the process of creating new isotopes as they learn about the fragmentation process and the table of nuclides. Developed by scientists and students at Michigan State University; Isotopolis seeks to teach players about the world of particle physics through play. The game is 100% free-to-play (with no in-app purchases). Supported By: * The American Physical Society * MSU Vice President for Research * MSU Graduate Studies * MSU University Outreach and Engagement * MSU College of Communication Arts * MSU Chief Information Officer * MSU Department of Physics of Astronomy * Joint Institute for Nuclear Astrophysics * National Science Foundation
Spaceflight Simulator
Build and launch rockets to explore a realistic, open universe. Experience space exploration with accurate physics and a vast, explorable solar system.
- Build custom rockets
- Realistic orbital mechanics
- Explore a scaled universe
- Visit planets and moons
- Open-world space exploration
- Real-life physics simulation
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This game is about space explorations, its about building your own rocket, and going out to explore and see whats out there, all while following real life physics. • Realistically scaled universe, with planets up to hundreds of kilometers in size and millions of kilometers of space between them. • Realistic orbital mechanics • Open universe, if you see something in the distance, you can go there, no limits, no invisible walls. Current planets: Mercury. Venus. Earth. Moon. Mars. Phobos. Deimos.
Screenshots
Verdict
The clearest difference is rating: Spaceflight Simulator at 4.8 against Isotopolis's 4.2. Spaceflight Simulator also leads on update cadence (every 9 days vs every 37 months) and ratings volume (98K vs 10). Isotopolis's advantage is in-app purchases (none vs 11) and iOS requirement (10.0 vs 15.0). On price, 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. Spaceflight Simulator sells 10 one-off in-app purchases. Isotopolis asks for nothing beyond the download.
Spaceflight Simulator holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Spaceflight Simulator has 98K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 63% of Isotopolis's written reviews are positive against 85% of Spaceflight Simulator's.
Isotopolis ships an update every 37 months, Spaceflight Simulator every 9 days. The most recent releases landed on October 3, 2026 and October 16, 2026 respectively.
| Parameter | Isotopolis | Spaceflight Simulator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (10 ratings) | 4.8 (98K ratings) — better |
| Positive reviews | 62.5% of reviews | 85.3% of reviews — better |
| Number of ratings | 10 | 98K — better |
| Update frequency | Every 37 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 189 MB | 172 MB |
| Age rating | 4+ | 4+ |
| Developer | Brian Winn | Spaceflight Simulator UK Ltd |
Customer experience
Isotopolis
Spaceflight Simulator
Bugs and requests
Isotopolis
Not enough reviews yet to summarise bugs or requests.
Spaceflight Simulator
Reported bugs
4 issues- Rocket parts sometimes clipping through each other
- Occasional freezing or crashing when launching large rockets
- Issues with RCS thrusters firing unexpectedly during docking
- Problems with maintaining stable orbits and transfers
Requested features
6 requests- Add more planets, moons, and celestial bodies to explore
- Implement a career mode or progression system with challenges
- Allow for more customization of rocket parts and spacecraft
- Improve docking and rendezvous mechanics to make them more accessible
- Add the ability to control individual astronauts and perform EVAs
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- Implement a fuel line system for more efficient staging
In-app purchases
Isotopolis
No in-app purchases
Spaceflight Simulator
- Skins Expansion$2.99
- Full Version$3.99
- Redstone + Atlas Pack$3.99
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- Parts Expansion$4.99
- Infinite Area Expansion$4.99
- Expansion Bundle$7.99
- Cheats Expansion$9.99
- Full Bundle Upgrade$9.99
- Full Bundle$11.99
- Full Bundle$14.99
Questions
Is Isotopolis free?
Is Spaceflight Simulator free?
Which has better reviews, Isotopolis or Spaceflight Simulator?
Do Isotopolis or Spaceflight Simulator have ads?
Which is updated more often, Isotopolis or Spaceflight Simulator?
Other comparisons
