Solar System Sim vs UniPad
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.
UniPad
Create and play your own rhythm music with a vast library of songs and customizable skins. Connect external MIDI equipment for an enhanced experience. Practice tools are included to help you master your tracks.
- 40+ base songs
- Create custom project files
- Automatic playback and practice features
- Customizable skins
- Launchpad and MIDI equipment connection
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- Enjoy a wide range of content with over 40 base songs. - Create your own project files. - Features that play automatically and help you practice are built. - You can make your own unique unipad by coating it with skin. - The launchpad and midi equipment can be connected with app.
Screenshots
Verdict
The clearest difference is rating: UniPad at 5.0 against Solar System Sim's 4.5. UniPad also leads on in-app purchases (none vs 5) and ads (none vs shown). Solar System Sim's advantage is ratings volume (4.3K vs 1) and update cadence (every 4 days vs every 10 days). On price 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. UniPad asks for nothing beyond the download.
UniPad holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Solar System Sim has 4.3K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 80% of Solar System Sim's written reviews are positive against 100% of UniPad's.
Solar System Sim ships an update every 4 days, UniPad every 10 days. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.
| Parameter | Solar System Sim | UniPad |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4.3K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 80.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 4.3K — better | 1 |
| Update frequency | Every 4 days — better | Every 10 days |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 532 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | WPC | jisub kim |
Customer experience
Solar System Sim
UniPad
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
UniPad
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
UniPad
No in-app purchases
