Comparison

Engine Sim vs RevLab

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

Head to head
About

Engine Sim

Experience realistic engine sounds with interactive controls. Explore a variety of engines, from kei cars to V12s, and feel the vibrations. Practice gear shifting and rev-matching for an immersive automotive simulation.

Highlights
  • 10 realistic engine sounds
  • Interactive throttle control
  • Live engine sound generation
  • Straight-pipe mode
  • Haptic feedback
  • H-pattern shifter and paddles
  • Rev-matching practice
Features
Read full description

Press the pedal and the engine roars for real. Just move your finger and 21 different engines come alive — from a 660cc turbo kei car to a W16 hypercar, all the way to a racing V10 that screams to 19,000 rpm. It's a new kind of toy you can just pick up and play. No complicated setup. Drag across the screen and feel how good a good engine sounds. SIMPLE TO PLAY, DEEP IF YOU WANT IT - 21 engine sounds: V-twin, turbo kei car (660cc), inline-4, inline-5, inline-6, boxer-4, flat-6, V6, cross-plane and flat-plane V8s, V10, V12, W16, and a racing V10 to 19,000 rpm - A throttle that reacts to exactly how hard you press: ease in for a soft idle, floor it for a full-throttle scream - Every sound is made live, not a recording on loop — so the same rev never sounds exactly the same twice - Straight-pipe mode in the chassis tuning screen: open up the exhaust for more pops and bangs on lift-off - Haptics that pulse with the revs, so you feel the engine in your hand - Color RPM gauge with a rev-limiter cutout FOR CAR PEOPLE, THERE'S MORE - An H-pattern shifter (switch to paddles anytime) so you change gears yourself - Practice rev-matching: brake, blip the throttle, shift. Nail it and it's smooth; botch it and you feel the driveline thump - Per-cylinder firing and uneven exhaust timing keep it from ever sounding like a loop - Tune each engine: spend miles earned by driving on mufflers, intakes, headers, superchargers, cams and ECU maps, and see your 0–100 km/h (0–62 mph) time, top speed and torque change on the spot - Chassis tuning shared across every engine: weight reduction, aero and a lighter flywheel - A Parts Crate for extra parts, with the odds shown in the app - Garage miles keep accruing even while the app is closed - A Pit Stop summary after every drive: distance, miles earned, and any personal bests - Daily tasks, a login bonus, and achievements you can trade in for perks - Game Center leaderboards for top speed and 0–100 km/h - Invite friends with a referral code for bonus miles WHO IT'S FOR - Anyone who loves engine and car sounds - Anyone who wants a bit of fun tinkering with a car while waiting or on the go - Fans curious what a V12 or flat-6 sounds like without owning one - Drivers who want to practice rev-matching before getting behind the wheel AVAILABILITY You start with the inline-4 and every core feature, with no ads on the driving screen. Driving earns miles that unlock the remaining engines and parts through the unlock tree. The next unowned V6, V8 or V12 engine can be rented for 10 minutes after a short video ad, and straight-pipe mode can be unlocked for 24 hours the same way. An optional one-time purchase removes the full-screen ads shown between engine switches; rentals, straight-pipe trials and mile rewards stay available either way. No subscriptions. Tip: headphones or earphones bring out the fine detail in every sound.

About

RevLab

Features
Read full description

RevLab runs the engine for real. It computes the crank, pistons, valves, combustion and exhaust gas flow in real time, and that one simulation drives the engine sound, the haptics, the gauge needles and the 3D engine. There is no animation made just for the screen: the needle moves for the same reason the sound changes. ■ SOUND THAT IS COMPUTED Cylinder count, firing order, crank geometry and exhaust manifold shape the sound. The uneven burble of a crossplane V8, the high, clean scream of a flatplane V8, the rumble of a flat-four on unequal-length headers, the odd 144° beat of an inline five, the overlapping power strokes of a V12. Starter cranking, idle, the rev limiter, lift-off and stalling all come out of the simulation. Listen from five positions: rear, front, driver's seat, engine bay and a measurement mic. ■ 11 ENGINES, 2 TO 16 CYLINDERS 45° V-twin; inline three, four, five and six; flat-four; crossplane and flatplane V8; V10; V12; V16. Check displacement, bore × stroke, compression, firing order, firing interval and redline in the Garage, then put the engine on stage. Every number on a card is computed from the engine data the simulator actually runs. Each engine arrives in a car and gearbox that suit it, and Setup changes them any time. ■ DRIVE IT YOURSELF A 3D gated shifter and three pedals: clutch, brake and throttle. Dump the clutch too early and the engine stalls. Shift without it and the gears grind. Multi-touch heel-and-toe works. • Gearboxes: 6- and 5-speed manual (H-pattern), 7-speed DCT, 8-speed automatic, 6-speed sequential • Auto clutch: OFF (fully manual), LAUNCH, SHIFT or GUARD. Touch the pedal and it is yours again • COMFORT, ECO and SPORT drive modes change the throttle map and shift points for real, and the cluster theme follows • The daily sedan's 8-speed automatic shifts with P, R, N and D push buttons ■ GAUGE CLUSTERS A 2000s sport cluster with stepper-motor needles, a 2020s OLED digital cluster, an LED-backlit analog cluster where light shines through the numerals, and a 12.3-inch TFT digital cluster. Every needle and digit reads the same engine state as the sound. ■ LOOK INSIDE • F1 Combustion: a cylinder cutaway shows compression, ignition, combustion and exhaust with the gas temperature, plus the pressure–crank-angle trace and cycle numbers such as peak pressure and IMEP • F4 Exhaust: watch pressure waves travel through the header • STROBE: like a timing light, it captures every cycle at the same crank angle, so the engine moves in slow motion even at 7,000 rpm. One amber spine ties every trace and the 3D crank to the same angle ■ DARK STUDIO A PBR 3D engine under softboxes in a dark studio, with a glossy reflective floor. Pistons, crank and valves move at the simulated angles, and the exhaust headers carry heat tint computed from simulated temperatures. ■ FEEL IT (iPhone) Core Haptics delivers engine vibration, clutch bite, gear engagement and grinds, the limiter, start-up and stalls at the moment you hear them. Pick the haptics level in Settings; the default is a calm one that only marks shifts and the rev limiter. ■ FREE AND REVLAB PRO Free: three engines (inline four, inline six and crossplane V8), every gearbox and clutch mode, every gauge cluster, focus views and STROBE, and haptics. Sound quality and controls are never locked. RevLab Pro (one-time purchase, not a subscription, Family Sharing) unlocks eight more engines (V-twin, inline three, inline five, flat-four, flatplane V8, V10, V12, V16) and the front listening position. ■ ALSO • English and Korean • iPhone and iPad, portrait and landscape • Left- or right-hand-drive layout, metric or imperial units • Display levels: Driver, Engineer, Lab • No account, works without an internet connection Made for people who love engines. Turn the key.

Screenshots

Engine Sim4 screens
RevLab4 screens

Verdict

The call

The clearest difference is chart position: Engine Sim at #38 against RevLab's unranked. On price, ads, in-app purchases and device support 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 Sim sells 10 one-off in-app purchases and RevLab sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 10 level
Engine Sim versus RevLab: the parameters behind the verdict, then further details
ParameterEngine SimRevLab
PriceFreeFree
Rating4.7 (73 ratings) — better—
Positive reviews85.7% of reviews—
Number of ratings73 — better—
Update frequencyEvery 3 days—
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
Best chart rank#38 — better—
DevicesiPhoneiPhone, iPad — better
Requires iOS18.017.0 — better
Further details — not scored
Size43 MB118 MB
Age rating4+4+
DeveloperSena TakasawaJehyung Lee

In-app purchases

10 purchases

Engine Sim

One-time10
  • Quick Shifter$1.99
  • Big Radiator$1.99
  • Over-Rev Kit$1.99
Show 7 more
  • Single 450 Moto$1.99
  • Today's Engine (I6/V8)$1.99
  • Big Bore Kit$2.99
  • Custom Gearbox$3.99
  • Today's Engine (V10/V12)$4.99
  • Straight Pipe$5.99
  • Pro Parts Pack$9.99
1 purchases

RevLab

One-time1
  • RevLab Pro$4.99

Questions

Is Engine Sim free?
Engine Sim is free to download, with in-app purchases available.
Is RevLab free?
RevLab is free to download, with in-app purchases available.
Do Engine Sim or RevLab have ads?
Both Engine Sim and RevLab show ads.

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