# Model Engine Builder vs PolyBike

The clearest difference is in-app purchases: PolyBike at none against Model Engine Builder's 1. PolyBike also leads on ads (none vs shown). Model Engine Builder's advantage is iOS requirement (15.6 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Model Engine Builder sells 1 one-off in-app purchase. PolyBike asks for nothing beyond the download.

## The numbers

| Metric | Model Engine Builder | PolyBike |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Weekly | — |
| Size | 20 MB | 27 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MIN GYu OH](https://appshunter.io/developer/6803589847) | [MARC JACOBS](https://appshunter.io/developer/1871071198) |

## 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 |


### PolyBike

[App page](https://appshunter.io/ios/app/polybike/id6818395553)

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

**In-app purchases:** none


## Frequently asked questions

### Is Model Engine Builder free?

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

### Is PolyBike free?

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

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

Model Engine Builder shows ads; PolyBike does not.

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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.*