# Trans4motor vs Explorion | Explore & Learn

The clearest difference is price: Explorion | Explore & Learn at Free against Trans4motor's $2.99. Explorion | Explore & Learn also leads on update cadence (weekly vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Explorion | Explore & Learn is free to download; Trans4motor costs $2.99 up front. Trans4motor sells 1 one-off in-app purchase and Explorion | Explore & Learn sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Trans4motor ships an update every 2 months, Explorion | Explore & Learn weekly. Both last shipped on October 11, 2026.

## The numbers

| Metric | Trans4motor | Explorion | Explore & Learn |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.7 (70 ratings)](https://appshunter.io/ios/app/trans4motor-engine-simulator/id899277186/reviews)** | — |
| Number of ratings | **70** | — |
| Positive reviews | 56.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 24 MB | 57 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kitt Peak, Inc.](https://appshunter.io/developer/399507326) | [V&T TECHNOLOGIES PTY. LTD.](https://appshunter.io/developer/1073524520) |

## 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 |


### Explorion | Explore & Learn

[App page](https://appshunter.io/ios/app/explorion-explore-and-learn/id6758781384)

This interactive app offers over 200 STEM activities for children, transforming complex subjects into engaging 3D experiences. It provides a safe, hands-on digital laboratory for exploring physics, math, biology, engineering, and astronomy.

**Highlights:** Interactive 3D STEM labs, Bite-sized learning modules, Hands-on object manipulation, Content for all ages, Safe and focused learning environment, Physics, math, biology, engineering, astronomy modules

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Explorion Premium | $9.99 | one-time |


## Frequently asked questions

### Is Trans4motor free?

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

### Is Explorion | Explore & Learn free?

Explorion | Explore & Learn is free to download, with in-app purchases available.

### Do Trans4motor or Explorion | Explore & Learn have ads?

Neither Trans4motor nor Explorion | Explore & Learn shows ads.

### Which is updated more often, Trans4motor or Explorion | Explore & Learn?

Trans4motor ships an update every 2 months, and Explorion | Explore & Learn weekly. Most recently, Trans4motor was updated on October 11, 2026 and Explorion | Explore & Learn on October 11, 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.*