Comparison

Engine Simulator vs Unlokee

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

Head to head
About

Engine Simulator

Explore the physics of piston engines by building, tuning, and testing them. Simulate combustion and rigid body motion in real-time. Compete with others on a global leaderboard by posting your creations.

Highlights
  • Physics-based engine simulation
  • Build engines from scratch
  • Tune fuel and ignition maps
  • Real-time power and torque readings
  • 3D engine visualization
  • Global leaderboard
Features
Read full description

Engine Simulator is a physics-based piston engine sandbox. The sound and motion come from a real rigid body simulation of the crank, pistons, valves, and combustion, not recordings. Start an engine, work the throttle, and tune its fuel and ignition maps in the ECU. Build one from scratch (layout, bore, stroke, cam, firing order) or describe what you want and have it generated on device. Watch it run in 3D, read live power and torque on the dyno, or push it past the limiter until it breaks. Post your engines to the global leaderboard and compare against other builders. Engine Simulator for iOS is an unofficial port. It is not affiliated with, endorsed by, or supported by AngeTheGreat (Ange Yaghi), the creator of the original open source Engine Simulator. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Community Guidelines: https://enginesimulator.app/community-guidelines.html Privacy Policy: https://enginesimulator.app/privacy-policy.html Support: https://enginesimulator.app/support.html

About

Unlokee

Engage in a tactile 3D lock-picking simulation that tests your patience and precision. Master various lock mechanisms through a progressive campaign and unlock new challenges. Experience satisfying feedback as you learn to manipulate pins and tension.

Highlights
  • Tactile 3D lock-picking simulation
  • Progressive campaign with 40+ locks
  • Cutaway view for mechanism inspection
  • Haptic and visual feedback
  • Multiple lock mechanism types
  • Random lock generation
  • Timed challenges
Features
Read full description

Every lock is a puzzle. Every click brings you closer. Unlokee is a tactile 3D lock-picking game about patience, precision, and the satisfaction of figuring out a mechanism. Balance tension with one finger and guide your pick with the other. Watch the pins move, feel the feedback, and find the moment when everything turns. A CAMPAIGN THAT BUILDS YOUR SKILL Work through 42 main locks and unlock 10 optional challenges. Start with simple mechanisms, discover new pin types through guided explanations, and put what you have learned to the test in chapter finales. LOOK INSIDE THE LOCK Use the cutaway view to see the pins, springs, and cylinder in motion. Then close the casing and take on the puzzle using visual indicators and haptic cues. SMALL MOVEMENTS, SATISFYING FEEDBACK Control pick depth, lift, and tension continuously. On supported devices, haptic feedback helps you read what is happening inside the lock. Optional tilt controls let you adjust tension by rotating your phone. MECHANISMS WITH DEPTH Progress from standard pins to spool, mushroom, serrated, T-pin, and telescopic designs. Learn to recognize false sets, recover from oversetting, and solve locks with multiple possible shear lines. MORE WAYS TO PLAY Choose a difficulty and generate a random lock, or test your precision against the clock. Replay campaign locks with the same combinations, improve your best medals, and track your progress across the map. Take your time. Find the click. Open the next lock.

Screenshots

Engine Simulator4 screens
Unlokee4 screens

Verdict

The call

The clearest difference is rating: Unlokee at 5.0 against Engine Simulator's 4.2. Unlokee also leads on update cadence (every 2 days vs every 3 weeks) and review sentiment (100% vs 79%). Engine Simulator's advantage is ratings volume (136 vs 1) and chart position (#61 vs unranked). On price, ads, in-app purchases and monetization model 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. Engine Simulator sells 1 one-off in-app purchase and Unlokee sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Unlokee holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Engine Simulator has 136 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 79% of Engine Simulator's written reviews are positive against 100% of Unlokee's.

UpkeepUpdate frequency

Engine Simulator ships an update every 3 weeks, Unlokee every 2 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 5 level
Engine Simulator versus Unlokee: the parameters behind the verdict, then further details
ParameterEngine SimulatorUnlokee
PriceFreeFree
Rating4.2 (136 ratings)5.0 (1 ratings) — better
Positive reviews78.8% of reviews100.0% of reviews — better
Number of ratings136 — better1
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#61 — better—
DevicesiPhone, iPad, Mac — betteriPhone
Requires iOS18.618.0 — better
Further details — not scored
Size22 MB36 MB
Age rating4+4+
DeveloperMUHAMMAD SAAD ATADmitrii Rozhkov

Customer experience

Engine Simulator

All ratings127 ratings
Positive84.3%
Neutral5.5%
Negative10.2%
Written reviews99 reviews
Positive78.8%
Neutral9.1%
Negative12.1%

Unlokee

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Engine Simulator

One-time1
  • Lifetime$8.99
1 purchases

Unlokee

One-time1
  • Full Game$7.99

Questions

Is Engine Simulator free?
Engine Simulator is free to download, with in-app purchases available.
Is Unlokee free?
Unlokee is free to download, with in-app purchases available.
Which has better reviews, Engine Simulator or Unlokee?
Unlokee is rated higher. Engine Simulator averages 4.2 out of 5 from 136 ratings, while Unlokee averages 5.0 from 1 ratings.
Do Engine Simulator or Unlokee have ads?
Neither Engine Simulator nor Unlokee shows ads.
Which is updated more often, Engine Simulator or Unlokee?
Engine Simulator ships an update every 3 weeks, and Unlokee every 2 days. Most recently, Engine Simulator was updated on October 25, 2026 and Unlokee on October 24, 2026.

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