# Orbits Up vs Model Engine Builder

The clearest difference is in-app purchases: Orbits Up at none against Model Engine Builder's 1. Orbits Up also leads on ads (none vs shown). Model Engine Builder's advantage is iOS requirement (15.6 vs 18.2). 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. Orbits Up asks for nothing beyond the download.

## The numbers

| Metric | Orbits Up | Model Engine Builder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Weekly |
| Size | 5 MB | 20 MB |
| Requires iOS | 18.2 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bradley Barr](https://appshunter.io/developer/1598758066) | [MIN GYu OH](https://appshunter.io/developer/6803589847) |

## What reviewers say

### Orbits Up

[App page](https://appshunter.io/ios/app/orbits-up/id6743768764)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Orbits Up free?

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

### Is Model Engine Builder free?

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

### Do Orbits Up or Model Engine Builder have ads?

Model Engine Builder shows ads; Orbits Up 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.*