Trans4motor is a simulator where you can control the movements of single cylinder to 12 cylinder 4 stroke engines on the iPad/iPhone.
Recommended to anyone interested in car and motorcycle engines. This is for those who have a relentless love for engines and want to enhance their knowledge.
#3 Top Paid iPad App in Japan
#5 Top Paid iPhone App in Japan

1) Seamlessly transforms into different type of engines

Select from inline to V-type, or other multi-cylinder engines,
and watch the running engines transform over continuous CG animation.

Enjoy watching the inline engine camshaft separate into two parts as it transforms into the V-type engine and
how phase angle modulation between cylinders makes the crankshaft rotate, separate, and combine into many engine formations.

2) Add Engine Sound (In-App Purchase)

Developed in technical collaboration with "CAI MEDIA CO.,LTD.", the developer of the iPhone app featuring innovative synthetic engine sound, "RealEngineSim" this new feature will add a variety of realistic engine sounds ranging from different number of cylinders to explosions with unequal intervals and cylinder rest.
Engine Sound Add-On is available via In-App Purchase.

3) Accelerator Control

Accelerator control is available during engine sound replay. Tilt iPhone to different degrees as if pressing the accelerator pedal. Tilt forward horizontally (as if pressing the accelerator) to activate the accelerator, and erect vertically (as if releasing the accelerator) to deactivate it.
Furthermore, you can race the engine by tapping the center of rev counter.

4) Addition/expansion of engines

There are currently 22 types of engines registered. Through automatic network updates, continuous expansion is planned.

In addition, there are functions installed that allow users to newly register and edit engines.

Able to adjust setting for engine bore stroke, firing order, and ignition timing.
Easily replicate on the iPad, engines with unequal combustion intervals for two-wheelers, Inline-four crossplane or V5.

5) Interactive Movie

·Four-stroke engines
·Firing Order
·V Angle
Recorded 3 controllable presentation videos.

Additional functions planned in the future.
·Functions to post and share engine specs that you have created.
·OHV(V2), SOHC, W engines support.

The company and product names used within the application are generally registered trademarks or trademarks of the respective companies.
The objective of this application is to upload engine specifications disclosed to the public and to learn about general information regarding engines.
It does not accurately replicate actual machine measurements and designs.
The CG animated engine rotates at one tenth of the actual speed to enable users to learn the structure and to enjoy the visual.

What’s New

Version 2.2

This app has been updated by Apple to use the latest Apple signing certificate.

Ready and optimized for iPhone X.

Ratings and Reviews

3.9 out of 5
52 Ratings

52 Ratings

Flea Hunter ,

Pretty Cool

Beautifully rendered app. The interface is easy and the graphics are smooth and look great.

No, this probably won’t help you with any kind of troubleshooting or simulated engine modification.

Yes! It’s the best portable app I’ve seen to show someone the basics of what’s going on when they fire up their car. Plus, if you’re a gear head, it’s just fun to look at now and then.

As another reviewer said, I’d like to see some diesels added including the opposing piston type. Perhaps a gas rotary piston engine. I’d also like removable layers for distributors/ignition modules, cam/crank position sensors, and spark plug wires.
I’d even be willing to pay a reasonable amount to add these features to my existing app. I’ll update to 5 if this ever happens!

Lean mean sterilizing machine ,

I Love It!!! But...

I’ve had this game since October 2 of 2017 and I loved the hell out of this game. I first downloaded this game to see how a car works or other vehicles work and I was not disappointed. I’ve used this game to even help my self in the real world, I own a tiny little CRX and this app helped me with identifying certain engine parts. I just absolutely love this game to bits. But there’s just a couple of downsides, there are (currently) no turbocharger, or supercharger options nor is there Diesel or two stroke engines. I wish to see some of this stuff in the future and maybe even nitrous options or old WW2 radial engines in the game. I really really hope the developers are still here looking at there reviews and game, I will even pay for such options if the creator responds back in some way. I just really want to see this app grow larger as time goes on and this is kinda of my cry to the developer or developers of this game to make it much more interesting. I really hope they have read this review and have not given up hope for the app, but for now thank you.

Lance Killian

Aarons boss ,

Pitts peak

I love the game very much so but if we could make turbos and boost pressure a thing I’d love a dyno tuning set up so I can see how much power is being put out and for the customer and consumer alike I’d like really high revving engines based on the crankshaft size that would make the game much better and a sweet shifting pattern you Could by for a dollar with the dyno for a dollar 💵 it is my dream to make Custom engines this game reminds me of opening up my own shop

App Privacy

The developer, Kitt Peak, Inc., has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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