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★★★★★
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• New Challenges: build a car to a brief, run it on the simulated test track and earn medals, with Game Center leaderboards. • New Vehicle tab: put your engine in a 3D car with a gearbox, driven wheels, tyre slip and working brakes. • New experimental turbo with spool, wastegate, intercooler and knock control, and boost on Drive. • More to tune: port fuel injection, custom cams, headers, runner lengths, throttle body and crankshaft types. • Dyno pulls now run on the physics, and Live graphs show temperature and fuel for every cylinder. • One redesigned Drive cockpit on iPhone and iPad, with brake, throttle and hold to rev. The rev limiter now cuts fuel too.
Build an engine and hear it run. Engine Lab is a touch-first engine simulator: design anything from a single to a V12, then hear it idle, rev and pull to the limiter, live on your iPhone or iPad. BUILD BENCH • Set the layout, 1 to 12 cylinders, bore, stroke, firing order and redline. • Hear each change as you make it, and hold to rev. • Try different headers, exhausts and mufflers. • Compare against a saved version by ear or on the dyno. SEE IT IN 3D • Every engine, including your own builds, becomes a 3D model driven by the live simulation: pistons, crank, cams, valves and glowing headers. • Orbit, zoom, slow it down, switch between X-ray and solid, and tap any part for live readings. The classic 2D cutaway is one tap away. DRIVE IT • Manual or automatic gearbox with clutch and road speed, plus a gearing chart with top speed in each gear. • Simulated dyno pulls with torque and power curves. • Six built-in engines: Honda B18C5 VTEC, Honda TRX520 single, BMW M52B28, Toyota 2JZ, Audi 2.3 inline-5 and GM LS V8. IMPORT AND SHARE • Import engine-sim .mr scripts and share your builds as .mr files. • Export a WAV recorded by the on-device simulator. No account, network service or microphone permission is required. An optional one-time Pro purchase unlocks advanced tuning and unlimited saved builds; the free plan keeps three. Values are simulated estimates for exploration, not certified engineering measurements.