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

Ready and optimized for iPhone X.

Ratings and Reviews

3.8 out of 5
33 Ratings
33 Ratings
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

Scat Pack ,

Excellent 3D 4-stroke engine animation

Very useful app for understanding cylinder layouts, timing cycles, and valve designs of various production automotive and motorcycle gasoline engines. It doesn't cover every engine in existence, but that isn't the point. It offers several pre-built variations of standard designs, but also unique features such as the Wankel engine, flatplane crank, and desmodromic valves. You can also adjust parameters to create other designs which is a great feature.

Garebear.30-06 ,

Great app! But could use a some work.

Please add Diesel engines such as
5.9 liter cummins and the 6.6 liter Duramax. Also add more components like turbochargers and superchargers.
And maybe make the engine building feature more useful by having the option to change the valve train from 2 valves per cylinder to 4 valves. And more option like that. Thanks for the app. Please continue to add new engines.


Kitt Peak, Inc.
33.7 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Japanese
Age Rating
Rated 4+
© Kitt Peak, Inc.
In-App Purchases
  1. Add Engine Sound $1.99


  • Family Sharing

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

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