Comparison

Physics! Fun vs Model Engine Builder

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

Head to head
About

Physics! Fun

Explore a realistic physics sandbox where you can build, break, and experiment with your own creations. Design complex machines, test structures, and manipulate gravity in an open-world environment. Frequent updates ensure endless creative possibilities.

Highlights
  • Realistic ragdoll physics
  • Dynamic particle and fluid simulations
  • Complex machine and structure building
  • Customizable gravity and environments
  • Intuitive building controls
  • Frequent content updates
Features
Read full description

WELCOME TO THE ULTIMATE PHYSICS PLAYGROUND! Step into a world where your imagination is the only limit. Physics! Fun is the ultimate ragdoll physics sandbox simulator where you can create, destroy, experiment, and unleash absolute chaos! Whether you want to test crazy inventions, smash custom vehicles, or drop massive nukes on unsuspecting ragdolls, this is your ultimate laboratory. UNLEASH PURE CHAOS Set off massive tactical explosions, trigger custom nukes, and watch the physics engine cause total mayhem. Splash beautiful neon liquids, mix toxic acids, and trigger volcanic pink lava. Want to bend reality? Turn on the Zero Gravity mode or invert the gravity slider to watch everything float and drift in space! BUILD & ANIMATE YOUR CREW Create your own custom characters using the advanced character editor! Choose from ninjas, robots, mummies, zombies, or Santas. Assemble custom limbs, change heads, and bring them to life. Animate your ragdolls or destroy them in the most satisfying ways possible! CRASH, SMASH & DRIVE Take control of monster trucks, sports cars, and heavy-duty vehicles. Drive them off massive ramps, smash them head-on into brick walls, or tether them to giant rockets. Watch realistically simulated crashes where ragdoll drivers get launched mid-air with true-to-life physics. ABSURD RAGDOLL ANIMALS Who said sandbox games are only for humans? Spawn realistic bears, crazy animals, and custom creatures. Tether them with ropes, attach them to industrial magnets, or launch them into orbit. The interactions are 100% unpredictable and hilariously dynamic. SATISFYING LIQUIDS & FLUID DYNAMICS Experience highly advanced fluid simulation! Mix green slime, pink jelly, honey, and deadly acid inside glass tanks. Pump liquids around, watch them splash, overflow, and react realistically with ragdolls and obstacles. INFINITE TOOLS & 250+ OBJECTS Never run out of ideas! Explore a massive, ever-growing warehouse packed with over 250 unique objects. From landmines, C4s, and machine guns to chains, gravity modifiers, and community garage mods—you have a complete toolbox at your disposal. PLAY ANYWHERE - NO WI-FI REQUIRED! No internet? No problem! Physics! Fun works completely offline. Enjoy the full physics simulation anytime, anywhere, with absolutely no limits. Download Physics! Fun today and start your chaotic experiments! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Model Engine Builder

Features
Read full description

Build a miniature engine one part at a time in a retro pixel workshop. Choose from eight designs: diesel, OHV, DOHC, two-stroke, parallel twin, inline four, V-twin and boxer four. Fit parts in order, tighten bolts to the right torque, adjust each engine’s setup and time its ignition. The same engine model appears in selection and assembly. Follow moving pistons, connecting rods and the compact DOHC timing chain as you build. Every stage contributes to a score out of 1,000. Keep a personal best and recent build history for each engine on your device. Three engines are available from the start. Unlock the others by completing optional rewarded ads. The non-consumable Remove Ads purchase removes advertising and unlocks all engines; purchases can be restored. Play in English, Korean, Japanese, French, Spanish, German, Traditional Chinese, Thai, Italian or Hindi. Change language in the globe menu. Advertising privacy choices are available where required. A stylized assembly and timing game, not a repair manual or engineering simulator. Compete on a separate Game Center leaderboard for each of the eight engines. Online rankings require Game Center sign-in.

Screenshots

Physics! Fun4 screens
Model Engine Builder4 screens

Verdict

The call

Physics! Fun and Model Engine Builder are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Physics! Fun sells 5 in-app purchases, starting at $4.99 per month and Model Engine Builder sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 22, 2026 and October 4, 2026 respectively.

ScorecardNo meaningful differences
Physics! Fun versus Model Engine Builder: the parameters behind the verdict, then further details
ParameterPhysics! FunModel Engine Builder
PriceFreeFree
Rating4.8 (6 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings6 — better—
Update frequencyEvery 2 weeksEvery 2 weeks
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS1615.6 — better
Further details — not scored
Size71 MB20 MB
Age rating9+4+
DeveloperRamazan SaglamMIN GYu OH

In-app purchases

5 purchases

Physics! Fun

Subscriptions2
  • Plus Monthly$4.991 Month
  • Plus Yearly$29.991 Year
One-time3
  • Small Block Package$1.99
  • Medium Block Package$2.49
  • Large Block Package$2.99
1 purchases

Model Engine Builder

One-time1
  • removeads$1.99

Questions

Is Physics! Fun free?
Physics! Fun is free to download, with in-app purchases available.
Is Model Engine Builder free?
Model Engine Builder is free to download, with in-app purchases available.
Do Physics! Fun or Model Engine Builder have ads?
Both Physics! Fun and Model Engine Builder show ads.
Which is updated more often, Physics! Fun or Model Engine Builder?
Physics! Fun ships an update every 2 weeks, and Model Engine Builder every 2 weeks. Most recently, Physics! Fun was updated on September 22, 2026 and Model Engine Builder on October 4, 2026.

Other comparisons