# Engine LD vs Trans4motor S

The clearest difference is update cadence: Trans4motor S at weekly against Engine LD's every 5 months. Engine LD's advantage is price ($2.99 vs $5.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Engine LD costs $2.99 and Trans4motor S $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Engine LD ships an update every 5 months, Trans4motor S weekly. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Engine LD | Trans4motor S |
| --- | --- | --- |
| Price | **$2.99** | $5.99 |
| Rating | — | **[4.6 (19 ratings)](https://appshunter.io/ios/app/trans4motor-s/id1561448237/reviews)** |
| Number of ratings | — | **19** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | — | Paid |
| Size | 10 MB | 127 MB |
| Requires iOS | **13.0** | 14.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DRH YAZILIM VE MUHENDISLIK HIZMETLERI LTD STI](https://appshunter.io/developer/914295588) | [Kitt Peak, Inc.](https://appshunter.io/developer/399507326) |

## What reviewers say

### Engine LD

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

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

**In-app purchases:** none


### Trans4motor S

[App page](https://appshunter.io/ios/app/trans4motor-s/id1561448237)

Explore the inner workings of various four-stroke aircraft engines through detailed CG animations. Experience realistic engine sounds, throttle control, and interactive modes like cutaway views and engine start-up simulations. Learn about engine mechanics and history.

**Highlights:** Transform between engine types, Realistic engine sound and throttle control, Cutaway view of engine internals, Virtual engine start-up procedure, Interactive movie presentations, Machine gun firing simulation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Engine LD free?

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

### Is Trans4motor S free?

Trans4motor S costs $5.99, with no in-app purchases.

### Do Engine LD or Trans4motor S have ads?

Neither Engine LD nor Trans4motor S shows ads.

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

Engine LD ships an update every 5 months, and Trans4motor S weekly. Most recently, Engine LD was updated on October 9, 2026 and Trans4motor S on October 1, 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.*