Trans4motor R

Trans4motor R

Engine Transmission Simulator

11 ratings
25 reviews
$7.99

Lowest price: $7.99 10 months ago (-0%)


Price history


Details

Released
December 10, 2025
Updated
October 14, 2026
Trans4motor R video #1 for iPhone
Trans4motor R screenshot #2 for iPhone
Trans4motor R screenshot #3 for iPhone
Trans4motor R screenshot #4 for iPhone
Trans4motor R screenshot #5 for iPhone
Trans4motor R screenshot #6 for iPhone
Trans4motor R screenshot #7 for iPhone
Trans4motor R screenshot #8 for iPhone
Trans4motor R screenshot #9 for iPhone
Trans4motor R screenshot #10 for iPhone
Trans4motor R screenshot #11 for iPhone
iphone
ipad
🖼️Get Icon
Icons↘︎

About

Explore and animate four-stroke engines with detailed customization options. Simulate transmissions, edit engine specifications, and experience realistic vehicle physics. Share your creations and learn about engine mechanics through interactive tutorials.

✓Seamless engine morphing (inline to V, cylinder count, firing intervals)
✓Full transmission visualization (3-shaft, 2-shaft, dog gearbox)
✓Deep engine specification editing
✓Realistic vehicle physics simulation
✓Community sharing platform for engine designs
✓Interactive learning modes (TechTour)
✓Enhanced, realistic engine sound simulation
Show original description
+1

What's New in Trans4motor R

1.1.0

October 14, 2026

Introducing the new “MotionStep” feature, plus a new “VTEC” chapter in TechTour. We’ve also redesigned the “Engines” sharing site and refined many details throughout Trans4motor R. ■ MotionStep Tap at any moment to freeze the engine, then step the crank angle forward or backward to take a closer look at the internal mechanics. While paused, you can still rotate, pan, and zoom the view freely. ■ TechTour A new “VTEC” chapter has been added, showing how the VTEC mechanism works. ■ Engines The “Engines” sharing site has been redesigned. Official engines and user-created engines are now clearly distinguished, and it’s easier to discover official and newly uploaded engines. New upload rules also let you share more of your engine creations. ■ Editing Slider controls in the engine editor have been further improved. While dragging on the slider, values now snap to larger grid increments for quick, coarse adjustment. Move your finger up or down away from the slider to switch to progressively finer grid increments, making it easy to fine-tune the value you want. ■ Graphs A crank-angle indicator has been added to the ignition timing and piston position graph, making it easier to follow how they relate to the current crank angle. ■ Other Improvements • Refined the motion of internal components such as cams and rocker arms • Improved automatic clutch engagement when launching from a standstill • Added selectable Normal/Reverse crank rotation for motorcycle engines • Made the valve angle adjustable across all engine configurations

More

User reviews

Love the app, one visualization problem

Any inline setup with OHV valvetrain puts the camshaft going through the cylinders and leaves the push rods in what looks like a V formation, that would be a great improvement to fix, looks like it was left half finished, also flathead valve in block would be nice to help visualize older flathead engines like the ford flathead 8
Show more

Amazing

This simulator is so amazing it has some learning aspects too. super cool to see how this works. one thing can you please add a wankel rotary engine and forced air induction systems like a turbo and a supercharger. otherwise perfect

単気筒OHVだとカムシャフトがシリンダーに埋まる

タイトル通りです。これは私の設計が悪いのかバグなのか分かりませんが、とにかく設計が破綻してしまいます。よろしくお願いします。

アップデートによる今後の進化に期待

点火時期調整によるサウンドの変化や、精巧な3D表示には脱帽です。
一方で、もう一声…!と思う点もございます。
例えば、必要以上に車重を稼がないと100km/hまでの加速が不自然なほどもたつく(タイヤサイズに関係なくTRCが介入する感覚)現象や、設定した最高回転数までエンジンが回らない現象等があります。
また、ユーザーが編集できる性能曲線等を追加や、車両のCd値の調整機能、タイヤのグリップ力の調整機能などを追加いただければ、多種多様な出力特性のエンジンやクルマが作成可能になる と期待しております。

お忙しい中ですが、お目通しいただけますと喜びます。

ターボやスーパーチャージャーも実装して欲しい

めっちゃいいアプリだったので課金しましたー!

でもターボやスーパーチャージャーも実装して欲しいなと思いました。

Developer apps

FAQ

What is Trans4motor R?

Trans4motor R is an interactive simulator that allows users to explore, design, and animate four-stroke engines and transmissions. It offers detailed customization for engine specifications and realistic vehicle physics.

What kind of engines can I simulate in Trans4motor R?

You can simulate a wide range of engines, from single-cylinder engines to V8s and V4 superbikes. The app allows you to alter cylinder count, bank angles, firing intervals, and more to create diverse engine configurations.

Does Trans4motor R have ads?

No, Trans4motor R does not contain advertisements. It is a paid application, and all features are available without interruption from ads.

What transmission types are supported in Trans4motor R?

Trans4motor R supports several transmission types, including 3-shaft synchromesh, 2-shaft synchromesh, and dog gearboxes (motorcycle-style). You can manually enter tooth counts or generate realistic gear meshes.

Can I share my engine creations with others using Trans4motor R?

Yes, Trans4motor R features a community sharing platform where you can upload and download engine designs. You can also share creations to X (formerly Twitter) and engage with a community of fellow enthusiasts.

How does Trans4motor R help with learning?

The app includes a 'TechTour' mode, which offers interactive tutorials on four-stroke fundamentals, firing orders, and synchromesh mechanisms. This hands-on approach makes understanding engine mechanics more engaging.

What devices is Trans4motor R compatible with?

Trans4motor R is designed for Apple devices and is compatible with both iPhone and iPad. It requires iOS 4+ and is available for purchase on the App Store.

How often is Trans4motor R updated?

The app was last updated on February 9, 2026, to version 1.0.5. This indicates a commitment to ongoing development and improvements.