# Model Engine Builder vs Tuning Simulator

The clearest difference is ads: Tuning Simulator at none against Model Engine Builder's shown. Tuning Simulator also leads on chart position (#79 vs unranked). 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 Tuning Simulator 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 every 5 days, Tuning Simulator every 3 days. The most recent releases landed on October 21, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Model Engine Builder | Tuning Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/tuning-simulator/id6817126925/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | — | Freemium |
| Best chart rank | — | **#79** |
| Size | 20 MB | 70 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) | [Scott Busby](https://appshunter.io/developer/6815279846) |

## 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 |


### Tuning Simulator

[App page](https://appshunter.io/ios/app/tuning-simulator/id6817126925)

**Currently charting:** #79 Top Grossing · Racing, #208 Top Free · Racing (US App Store)

Simulate engine tuning on a virtual dyno. Adjust fuel maps, timing, and boost to optimize power curves and engine health. Experience realistic engine behavior with various components and diagnostic tools.

**Highlights:** Simulated engine on a dyno, Adjustable fuel maps, timing, and boost, Realistic engine behavior and failures, Multiple engine types and parts, Career mode with customer jobs, Guided tutorials and lessons

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tuning Simulator Pro | $14.99 | one-time |


## Frequently asked questions

### Is Model Engine Builder free?

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

### Is Tuning Simulator free?

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

### Do Model Engine Builder or Tuning Simulator have ads?

Model Engine Builder shows ads; Tuning Simulator does not.

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

Model Engine Builder ships an update every 5 days, and Tuning Simulator every 3 days. Most recently, Model Engine Builder was updated on October 21, 2026 and Tuning Simulator on October 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*