# MotionGen vs ARK

The clearest difference is rating: ARK at 4.6 against MotionGen's 3.3. ARK also leads on review sentiment (83% vs 50%). MotionGen's advantage is iOS requirement (7.0 vs 16.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ARK holds the better App Store score, 4.6 against 3.3. Both are backed by a comparable volume of ratings — 16 and 11 respectively. Written reviews point the same way: 50% of MotionGen's written reviews are positive against 83% of ARK's.

## The numbers

| Metric | MotionGen | ARK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (16 ratings)](https://appshunter.io/ios/app/motiongen/id1065657088/reviews) | **[4.6 (11 ratings)](https://appshunter.io/ios/app/ark-community-hub-for-stem/id6737204004/reviews)** |
| Number of ratings | **16** | 11 |
| Positive reviews | 50.0% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Monetization | Free | Free |
| Size | 9 MB | 75 MB |
| Requires iOS | **7.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Mechanismic Inc.](https://appshunter.io/developer/1065657087) | [IMMACULATA TECHNOLOGIES LLC](https://appshunter.io/developer/1775240149) |

## What reviewers say

### MotionGen

[App page](https://appshunter.io/ios/app/motiongen/id1065657088)

This app synthesizes and simulates planar four-bar linkages, solving motion generation problems for multiple positions. It allows users to design and simulate single degree of freedom linkages for robots and machines, incorporating various pivot and line constraints.

**Highlights:** Synthesizes planar four-bar linkages, Simulates linkage motion, Solves N-position motion generation problems, Incorporates pivot and line constraints, Designs single degree of freedom linkages

**Features:** macOS Compatibility

**In-app purchases:** none


### ARK

[App page](https://appshunter.io/ios/app/ark-community-hub-for-stem/id6737204004)

This platform connects STEM enthusiasts, innovators, and educators globally. Share ideas, showcase projects, and collaborate with experts. Buy and sell creations in an integrated marketplace to foster innovation and learning.

**Highlights:** Connect with STEM enthusiasts, Collaborate on projects, Showcase innovations, Buy and sell creations, Access learning resources, Join discussions on tech topics

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

**In-app purchases:** none


## Frequently asked questions

### Is MotionGen free?

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

### Is ARK free?

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

### Which has better reviews, MotionGen or ARK?

ARK is rated higher. MotionGen averages 3.3 out of 5 from 16 ratings, while ARK averages 4.6 from 11 ratings.

### Do MotionGen or ARK have ads?

Neither MotionGen nor ARK shows ads.

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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.*