# Trans4motor vs Teach Savvy

The clearest difference is price: Teach Savvy at Free against Trans4motor's $2.99. Teach Savvy also leads on in-app purchases (none vs 1) and update cadence (every 4 days vs every 2 months). On ads, device support and iOS requirement there is nothing between them.

Teach Savvy is free to download; Trans4motor costs $2.99 up front. Trans4motor sells 1 one-off in-app purchase. Teach Savvy asks for nothing beyond the download.

Trans4motor ships an update every 2 months, Teach Savvy every 4 days. The most recent releases landed on October 20, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Trans4motor | Teach Savvy |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 80 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Kitt Peak, Inc.](https://appshunter.io/developer/399507326) | [DRIPBL STEAM ANALYTICS LLC](https://appshunter.io/developer/1782256014) |

## 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 |


### Teach Savvy

[App page](https://appshunter.io/ios/app/teach-savvy/id6738765543)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Trans4motor free?

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

### Is Teach Savvy free?

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

### Do Trans4motor or Teach Savvy have ads?

Neither Trans4motor nor Teach Savvy shows ads.

### Which is updated more often, Trans4motor or Teach Savvy?

Trans4motor ships an update every 2 months, and Teach Savvy every 4 days. Most recently, Trans4motor was updated on October 20, 2026 and Teach Savvy on September 30, 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.*