# Model Engine Builder vs Revving

The clearest difference is ads: Revving at none against Model Engine Builder's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Model Engine Builder sells 1 one-off in-app purchase and Revving sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Model Engine Builder ships an update weekly, Revving every 9 days. Both last shipped on November 6, 2026.

## The numbers

| Metric | Model Engine Builder | Revving |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/revving-engine-simulator/id6822065664/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 9 days |
| Size | 20 MB | 74 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MIN GYu OH](https://appshunter.io/developer/6803589847) | [Sensorial Studio](https://appshunter.io/developer/6822065666) |

## What reviewers say

### Model Engine Builder

[App page](https://appshunter.io/ios/app/model-engine-builder/id6803801661)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| removeads | $1.99 | one-time |


### Revving

[App page](https://appshunter.io/ios/app/revving-engine-simulator/id6822065664)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Engines | $2.99 | one-time |


## Frequently asked questions

### Is Model Engine Builder free?

Model Engine Builder is free to download, with in-app purchases available.

### Is Revving free?

Revving is free to download, with in-app purchases available.

### Do Model Engine Builder or Revving have ads?

Model Engine Builder shows ads; Revving does not.

### Which is updated more often, Model Engine Builder or Revving?

Model Engine Builder ships an update weekly, and Revving every 9 days. Most recently, Model Engine Builder was updated on November 6, 2026 and Revving on November 6, 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.*