Comparison

Solar System Sim vs Kat Game

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

Head to head
About

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.

Highlights
  • Explore planets and moons
  • Visit nearby stars
  • Create custom solar systems
  • Gravity and physics simulation
  • Recalculate orbits
  • Newton's laws implementation
Features
Read full description

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.

About

Kat Game

Features
Read full description

A cute question game for my kjæreste. In this game, two players ask each other questions or present physical challenges to each other, similar to truth or dare. There are additionally sub-games within this that offer their own challenges and rules. This game will not repeat cards until all cards have been played through, and skipping a card is as easy as clicking on it~

Screenshots

Solar System Sim4 screens
Kat Game4 screens

Verdict

The call

The clearest difference is in-app purchases: Kat Game at none against Solar System Sim's 5. Kat Game also leads on ads (none vs shown). Solar System Sim's advantage is update cadence (every 4 days vs monthly). On price, device support and iOS requirement 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. Solar System Sim sells 5 one-off in-app purchases. Kat Game asks for nothing beyond the download.

UpkeepUpdate frequency

Solar System Sim ships an update every 4 days, Kat Game monthly. The most recent releases landed on October 15, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
Solar System Sim versus Kat Game: the parameters behind the verdict, then further details
ParameterSolar System SimKat Game
PriceFreeFree
Rating4.5 (4.3K ratings) — better—
Positive reviews80.2% of reviews—
Number of ratings4.3K — better—
Update frequencyEvery 4 days — betterMonthly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size532 MB15 MB
Age rating4+4+
DeveloperWPCDale LaPlante

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
Show 5 more
  • 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

Kat Game

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Solar System Sim

One-time5
  • HD Mars$2.99
  • HD Earth$2.99
  • HD Moon$2.99
Show 2 more
  • No-ads$3.99
  • HD 3-body pack$6.99
None

Kat Game

No in-app purchases

Questions

Is Solar System Sim free?
Solar System Sim is free to download, with in-app purchases available.
Is Kat Game free?
Kat Game is free to download, with no in-app purchases.
Do Solar System Sim or Kat Game have ads?
Solar System Sim shows ads; Kat Game does not.
Which is updated more often, Solar System Sim or Kat Game?
Solar System Sim ships an update every 4 days, and Kat Game monthly. Most recently, Solar System Sim was updated on October 15, 2026 and Kat Game on October 6, 2026.

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