Engine Simulator vs Unlokee
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- Physics-based engine simulation
- Build engines from scratch
- Tune fuel and ignition maps
- Real-time power and torque readings
- 3D engine visualization
- Global leaderboard
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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
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.
- 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
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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
Verdict
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
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.
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.
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.
| Parameter | Engine Simulator | Unlokee |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (136 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 78.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 136 — better | 1 |
| Update frequency | Every 3 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #61 — better | — |
| Devices | iPhone, iPad, Mac — better | iPhone |
| Requires iOS | 18.6 | 18.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | MUHAMMAD SAAD ATA | Dmitrii Rozhkov |
Customer experience
Engine Simulator
Unlokee
In-app purchases
Engine Simulator
- Lifetime$8.99
Unlokee
- Full Game$7.99
Questions
Is Engine Simulator free?
Is Unlokee free?
Which has better reviews, Engine Simulator or Unlokee?
Do Engine Simulator or Unlokee have ads?
Which is updated more often, Engine Simulator or Unlokee?
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