# Mobile Multibody Dynamics vs Eng Fluids

The clearest difference is update cadence: Mobile Multibody Dynamics at monthly against Eng Fluids's every 13 months. Eng Fluids's advantage is iOS requirement (9.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Mobile Multibody Dynamics ships an update monthly, Eng Fluids every 13 months. The most recent releases landed on September 16, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Mobile Multibody Dynamics | Eng Fluids |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (6 ratings)](https://appshunter.io/ios/app/mobile-multibody-dynamics/id1491149780/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 13 months |
| Monetization | Free | — |
| Size | 111 MB | 21 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Eliott Radcliffe](https://appshunter.io/developer/1477487767) | [Kurt Gramoll](https://appshunter.io/developer/782218116) |

## 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

**In-app purchases:** none


### Eng Fluids

[App page](https://appshunter.io/ios/app/eng-fluids/id1540624295)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mobile Multibody Dynamics free?

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

### Is Eng Fluids free?

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

### Do Mobile Multibody Dynamics or Eng Fluids have ads?

Neither Mobile Multibody Dynamics nor Eng Fluids shows ads.

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

Mobile Multibody Dynamics ships an update monthly, and Eng Fluids every 13 months. Most recently, Mobile Multibody Dynamics was updated on September 16, 2026 and Eng Fluids on September 21, 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.*