# Trans4motor vs Engine LD

The clearest difference is in-app purchases: Engine LD at none against Trans4motor's 1. Engine LD also leads on iOS requirement (13.0 vs 15.0). Trans4motor's advantage is update cadence (every 2 months vs every 5 months). On price, ads and device support there is nothing between them.

Trans4motor costs $2.99 and Engine LD $2.99 up front. Trans4motor sells 1 one-off in-app purchase. Engine LD asks for nothing beyond the download.

Trans4motor ships an update every 2 months, Engine LD every 5 months. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Trans4motor | Engine LD |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | **[3.7 (70 ratings)](https://appshunter.io/ios/app/trans4motor-engine-simulator/id899277186/reviews)** | — |
| Number of ratings | **70** | — |
| Positive reviews | 56.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 10 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kitt Peak, Inc.](https://appshunter.io/developer/399507326) | [DRH YAZILIM VE MUHENDISLIK HIZMETLERI LTD STI](https://appshunter.io/developer/914295588) |

## What reviewers say

### Trans4motor

[App page](https://appshunter.io/ios/app/trans4motor-engine-simulator/id899277186)

Explore the mechanics of 4-stroke engines with this interactive simulator. Visualize the transformation of various engine types and understand their internal workings through detailed CG animation. Enhance your knowledge with adjustable settings and realistic engine sound options.

**Highlights:** Multi-cylinder engine transformation, Realistic engine sound (in-app purchase), Accelerator control simulation, Expandable engine library, Custom engine registration and editing, Interactive educational videos

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add Engine Sound | $1.99 | one-time |


### Engine LD

[App page](https://appshunter.io/ios/app/engine-ld/id930614716)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Trans4motor free?

Trans4motor costs $2.99, and also offers in-app purchases.

### Is Engine LD free?

Engine LD costs $2.99, with no in-app purchases.

### Do Trans4motor or Engine LD have ads?

Neither Trans4motor nor Engine LD shows ads.

### Which is updated more often, Trans4motor or Engine LD?

Trans4motor ships an update every 2 months, and Engine LD every 5 months. Most recently, Trans4motor was updated on September 21, 2026 and Engine LD on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*