# Mobile Multibody Dynamics vs Photronium

The clearest difference is rating: Photronium at 5.0 against Mobile Multibody Dynamics's 3.7. Photronium also leads on review sentiment (100% vs 67%). Mobile Multibody Dynamics's advantage is in-app purchases (none vs 1). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Photronium sells 1 one-off in-app purchase. Mobile Multibody Dynamics asks for nothing beyond the download.

Photronium holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 6 and 10 respectively. Written reviews point the same way: 67% of Mobile Multibody Dynamics's written reviews are positive against 100% of Photronium's.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 26, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Mobile Multibody Dynamics | Photronium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (6 ratings)](https://appshunter.io/ios/app/mobile-multibody-dynamics/id1491149780/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/photronium-physics-equations/id1546383517/reviews)** |
| Number of ratings | 6 | **10** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 111 MB | 59 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eliott Radcliffe](https://appshunter.io/developer/1477487767) | [Hao Nguyen](https://appshunter.io/developer/1546383519) |

## What reviewers say

### Mobile Multibody Dynamics

[App page](https://appshunter.io/ios/app/mobile-multibody-dynamics/id1491149780)

This app offers a graphical interface for mechanical engineers and physicists to model and simulate multibody dynamics. It bridges the gap between manual equation derivation and complex CAD-like software, serving as an educational tool for students and professionals.

**Highlights:** Graphical modeling interface, Simulation of multibody dynamics, Educational resource for engineering students, Export custom Python code, Accessible alternative to professional software, On-device modeling and analysis

**Features:** Vision Pro support

**In-app purchases:** none


### Photronium

[App page](https://appshunter.io/ios/app/photronium-physics-equations/id1546383517)

Access over 360 physics equations with clear explanations and powerful search tools. Test your knowledge with custom quizzes and learn offline anywhere, anytime. This educational reference is designed for learners of all levels.

**Highlights:** 360+ physics equations, Offline access, Intelligent Search, Symbol Search, Customizable quizzes, Bookmarking

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Multicolored Bookmarks | $0.99 | one-time |


## Frequently asked questions

### Is Mobile Multibody Dynamics free?

Mobile Multibody Dynamics is free to download, with no in-app purchases.

### Is Photronium free?

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

### Which has better reviews, Mobile Multibody Dynamics or Photronium?

Photronium is rated higher. Mobile Multibody Dynamics averages 3.7 out of 5 from 6 ratings, while Photronium averages 5.0 from 10 ratings.

### Do Mobile Multibody Dynamics or Photronium have ads?

Neither Mobile Multibody Dynamics nor Photronium shows ads.

### Which is updated more often, Mobile Multibody Dynamics or Photronium?

Mobile Multibody Dynamics ships an update monthly, and Photronium monthly. Most recently, Mobile Multibody Dynamics was updated on October 26, 2026 and Photronium on October 23, 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.*