# Trans4motor R vs OrbitSmith

The clearest difference is price: OrbitSmith at Free against Trans4motor R's $7.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

OrbitSmith is free to download; Trans4motor R costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Trans4motor R ships an update every 2 weeks, OrbitSmith every 3 weeks. The most recent releases landed on October 20, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Trans4motor R | OrbitSmith |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.6 (11 ratings)](https://appshunter.io/ios/app/trans4motor-r/id6739180076/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 64.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Paid | — |
| Size | 178 MB | 2 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kitt Peak, Inc.](https://appshunter.io/developer/399507326) | [Seita Iizuka](https://appshunter.io/developer/1882242857) |

## What reviewers say

### Trans4motor R

[App page](https://appshunter.io/ios/app/trans4motor-r/id6739180076)

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.

**Highlights:** 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

**In-app purchases:** none


### OrbitSmith

[App page](https://appshunter.io/ios/app/orbitsmith/id6761014126)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trans4motor R free?

Trans4motor R costs $7.99, with no in-app purchases.

### Is OrbitSmith free?

OrbitSmith is free to download, with no in-app purchases.

### Do Trans4motor R or OrbitSmith have ads?

Neither Trans4motor R nor OrbitSmith shows ads.

### Which is updated more often, Trans4motor R or OrbitSmith?

Trans4motor R ships an update every 2 weeks, and OrbitSmith every 3 weeks. Most recently, Trans4motor R was updated on October 20, 2026 and OrbitSmith on October 18, 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.*