聲浪 Rev Lab

Press Next track on your steering wheel to shift up! Connect your phone to the car audio and the engine sound follows your speed in real time. Free to try.

Rev Lab gives every drive an engine soundtrack.

Connect your iPhone to the car's Bluetooth audio and the sound follows your real speed and throttle: the low growl pulling away, the rising howl as revs climb, the kick of each shift and the crackle when you lift off. It works in any car whose audio can play sound from your phone: petrol, hybrid or electric.

A GROWING GARAGE OF ENGINES Turbo fours, an inline-five, straight-sixes, a V6, flat-plane V8s, naturally aspirated V10s and V12s, a flat-twelve, a twin-rotor rotary, plus a designed sound for an electric sports car. Many cars use real recordings from royalty-free sound libraries, switched and pitched by rpm.

FOLLOWS YOUR DRIVING

• GPS mode works out rpm and gear from your speed and shifts for you
• Motion sensors make the revs answer the moment you accelerate
• Simulator mode lets you hold the gauges to rev while parked
• Keeps playing with the screen locked
• Shift from the steering wheel: with Bluetooth audio, Next track shifts up and Previous track shifts down

GAUGES FOR EVERY CAR Original dial designs built around speed and rpm, easy to read upright or sideways.

TUNE THE SOUND Inside or outside listening position, overrun crackle and volume.

FREE TO START, PAY ONCE The two inline-four cars are free. Unlock any other car on its own, or get the full version to unlock all 17 paid cars at once. Pay once and keep it, no subscription; restore on your other iPhones with the same Apple ID.

PRIVACY Location and sensor data are processed only on your iPhone and never uploaded. No account, no ad tracking.

SAFETY Set things up before you drive and don't handle your phone while driving. Keep the volume low enough to hear traffic, horns and emergency vehicles, and follow local traffic laws. The sound is for entertainment only and does not reflect your vehicle's actual condition.