Takasawa Dynamics / Engine Sim

Engine Sim

A sound simulator for iPhone and Android that synthesizes engine sound in real time — not looped recordings.

• iPhone / iOS 26.0 or later
• Android 9 or later
• Free, with in-app purchases
• English and Japanese
• 21 engines

What the app actually does

Most engine sound apps ship a folder of recordings and cross-fade between them as you move a slider. Engine Sim does not have that folder. Every sample you hear is computed on the phone, one cylinder event at a time: the ignition pulse of each cylinder, the occasional misfire on overrun, the uneven spacing between the exhaust pulses of the two banks, and the resonance of the pipe the gas leaves through.

Because it is a model rather than a playlist, the sound follows what you do instead of jumping between clips. Throttle position, the H-pattern shifter (or paddles, or full automatic), the brake and the blip between downshifts all move the revs continuously, and the note moves with them — including the parts that are hard to record cleanly, like the load change at part throttle or a long overrun down through the gears.

The engines

Twenty-one configurations are included, chosen so that the differences between them are audible rather than cosmetic: a 450 cc single, parallel twins and a boxer twin, inline-fours with both crank layouts, an inline-six, V6s, crossplane and flatplane V8s, a V10, a V12, a W16, and a racing V10 that pulls to 19,000 rpm. Each one has its own firing order, bank angle, redline and exhaust geometry, which is why they sound like different engines instead of the same engine at different pitches.

Distance driven becomes “miles”, and miles unlock engines and parts through an unlock tree. Exhausts, intakes, headers, forced induction, camshafts and ECUs each change both the numbers (0–100 km/h, top speed) and the sound. Game Center leaderboards rank top speed and acceleration times.

Hear the difference yourself

Every engine and part can be unlocked by driving; the in-app purchases only shorten that, or remove the full-screen ads. There are no subscriptions.

Frequently asked

Are the sounds recordings of real engines?

No. There are no engine recordings in the app. Each audio buffer is generated from a physical model of ignition events, firing intervals and exhaust resonance, which is why the sound tracks the throttle continuously rather than stepping between clips.

Does it work offline?

Yes. The synthesis runs entirely on the device, so no network connection is needed to drive or to hear any engine you have unlocked.

Do I have to pay to get all the engines?

No. Every engine and part can be unlocked by driving and earning miles. In-app purchases shorten that process or remove the full-screen ads, and there are no subscriptions.

Which engines are included?

Twenty-one configurations, from a 450 cc single through parallel and boxer twins, inline-fours, an inline-six, V6s, crossplane and flatplane V8s, a V10, a V12 and a W16, up to a racing V10 that revs to 19,000 rpm.

Can I design my own engine?

Editing and listening to your own designs is free. Saving them and driving them is a one-time in-app purchase.

Support

Questions, feature requests and bug reports go to [email protected]. For a bug report, please include your device model, your iOS version and the app version shown at the bottom of the Settings screen. The Japanese support page, with the full in-app purchase breakdown, is at /apps/enjine-sim/, and the privacy policy is here.