Solar System Sim vs Reflex Challenge 1
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Solar System Sim
Simulate and explore celestial bodies within our solar system and beyond. Create your own solar systems, experiment with gravity and physics, and observe orbital mechanics in action.
- Explore planets and moons
- Visit nearby stars
- Create custom solar systems
- Gravity and physics simulation
- Recalculate orbits
- Newton's laws implementation
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Zoom from a planet's surface out to distant galaxies, then reshape the whole system with your own hands. Solar System Sim is a real-time gravity sandbox built on Newton's laws and real astronomical data. Every body you add, move or destroy recalculates the orbits of everything else, live. • Smash worlds together: impact craters carve into the surface, firestorms sweep the globe, and glowing debris rains back down. • Build your own universe: add planets, moons, asteroids and comets with their own size, mass and looks, or customise the ones already there. • Land anywhere: drop to a first-person view on any planet's surface and experience its environment. • Sculpt rings: add particle rings and watch gravity shape them in real time. • Witness real eclipses: solar and lunar, with real-world astronomical precision. • Follow comets: watch them streak past and interact with the bodies they meet. • Leave the Solar System: travel to remarkable nearby stars and find them within the Milky Way. • Feel the scale: see the true vastness of space, from a pebble-sized moon to the nearest galaxies. Whether you're here to learn how gravity really works or just to break planets with it, explore at your own pace. Start your cosmic adventure with Solar System Sim.
Reflex Challenge 1
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Think you have fast reflexes? Think your brain can't be tricked? Think again! Welcome to the ultimate test of speed, focus, and cognitive agility. In this fast-paced arcade game, luminous colored buttons will rapidly spawn on your grid. Your goal is simple: read the rule and tap (or avoid) the right colors before time runs out. But there’s a catch! The rules constantly change, and as you get better, the game actively tries to mess with your brain. How to Play PRESS ONLY: Tap the exact color mentioned on the screen. DO NOT TOUCH: Tap every other color except the forbidden one! Be Quick: Tap a correct button within the first second to earn a +5 point combo! Slower taps earn +1 point. Miss a button or tap the wrong color, and it’s Game Over. Game Modes Easy & Medium: Perfect for warming up your reflexes. The game gives you a friendly warning before the rules change. Hard Mode: No warnings, faster spawns, and pure chaos. Survive long enough, and the game unleashes the "Evil Trick"—changing the background colors of the instructions to deliberately confuse your brain! Timed vs. Endless: Race against the clock in Timed Mode, or see how long you can survive in Endless Mode (∞). Key Features Dynamic Brain Teasers: A mix of physical reflex testing and cognitive "Stroop Effect" puzzles. Satisfying Visuals & Audio: Enjoy sleek neon graphics, snappy button-pop animations, and satisfying sound effects for every combo. Dark Mode Support: Play comfortably at night with a built-in toggle for Dark and Light UI themes. Compete with Yourself: Track your all-time Best Score and push your limits. Do you have the focus to beat the Hard Mode trick? Download now and find out!
Screenshots
Verdict
The clearest difference is in-app purchases: Reflex Challenge 1 at none against Solar System Sim's 5. Reflex Challenge 1 also leads on iOS requirement (13.0 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. Solar System Sim sells 5 one-off in-app purchases. Reflex Challenge 1 asks for nothing beyond the download.
| Parameter | Solar System Sim | Reflex Challenge 1 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4.3K ratings) — better | — |
| Positive reviews | 80.2% of reviews | — |
| Number of ratings | 4.3K — better | — |
| Update frequency | Every 4 days | — |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 532 MB | 109 MB |
| Age rating | 4+ | 4+ |
| Developer | WPC | Yahya Boulahia |
Bugs and requests
Solar System Sim
Reported bugs
5 issues- Planets/moons disappearing after saving and loading
- Bright flashes and screen distortions
- Planets/objects getting stuck inside stars
- Crashes when colliding or editing certain objects
- Inconsistent orbital mechanics and moons ejecting from planets
Requested features
10 requests- Add more galaxy and nebula textures
- Implement realistic supernova effects
- Allow customization of planet atmospheres and terrain
- Add binary star systems and rogue planets
- Introduce a galaxy maker and collision feature
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- Implement a reverse time lapse option
- Add more speed options (128x, 256x, etc.)
- Introduce a population counter and life simulation for planets
- Allow custom city lights and vegetation on planets
- Add a Roche limit feature to observe tidal disruption
Reflex Challenge 1
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Solar System Sim
- HD Mars$2.99
- HD Earth$2.99
- HD Moon$2.99
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- No-ads$3.99
- HD 3-body pack$6.99
Reflex Challenge 1
No in-app purchases
Questions
Is Solar System Sim free?
Is Reflex Challenge 1 free?
Do Solar System Sim or Reflex Challenge 1 have ads?
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