# MechGen FG

> Tool for designing and animating four-bar linkages for crank rotation. (iPhone/iPad app by John McCarthy.)

- Source: https://appshunter.io/ios/app/mechgen-fg/id915956170 (this page in markdown: same URL + `.md`)
- Developer: [John McCarthy](https://appshunter.io/developer/915956173)
- Category: Productivity, Education
- Price: $0.99
- Rating: 3.50/5 from 4 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.1 · 11 MB
- Languages: American English
- Released: 2014-09-15
- Data updated: 2026-08-07
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/mechgen-fg/id915956170/reviews.md

## What is MechGen FG?

Design a four-bar linkage that connects the rotation of an input crank to the coordinated rotation of an output crank.  Locate the two cranks and define their input and output angles and let MechGen FG design four-bar linkages for you.  The design data and an animation of your linkage are easily distributed by email.  See the "MechGen FG demo" video on YouTube.

## Key features

- Design four-bar linkages
- Connect input and output crank rotations
- Define input/output angles
- Generate linkage designs
- Animate linkage movement
- Distribute designs via email

## Chart rankings

- #196 in Top Paid · Productivity (US App Store)

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/mechgen-fg/id915956170/reviews.md

### 5/5 — Shoutout to Kulinsky

*2022-06-01*

Lawrence Kulinsky I love you

### 3/5 — Well written but limited.

*2018-05-08*

This is a nice little app and does what it says on the tin. It would be good if the author was considering developing it further. Maybe allowing the user to choose the cranks and con' rod lengths. A slider-crank option would also be useful.

### 5/5 — excellent app

*2015-11-04*

Easy to use, easy to learn.

### 4/5 — Excellent Job

*2015-01-03*

Very clever for an individual to develop, that works as advertised & the UI is decent. It is not a toy but rather an assist in the design of 4 link mechanisms, where the math can be computed in seconds. Thank You!

### 3/5 — Good start

*2014-11-15*

Reminds me of Kinsyn kinematics.
Needs more limitation options like user defined link lengths. Current solutions are too random.

## Frequently asked questions about MechGen FG

### What is MechGen FG used for?

MechGen FG is used to design and animate four-bar linkages that connect the rotation of an input crank to an output crank. It helps users define angles and generate linkage designs.

### How much does MechGen FG cost?

MechGen FG is a paid application, priced at $0.99. This one-time purchase grants access to all its design and animation features.

### What devices is MechGen FG available on?

MechGen FG is available on iPhone, iPad, and iPod. It is designed for Apple's mobile and tablet operating systems.

### How often is MechGen FG updated?

The latest version, 3.3, was released on April 26, 2017. While the app has not been updated recently, it offers core functionality for linkage design.

### Can I share my MechGen FG designs?

Yes, the design data and animations created in MechGen FG can be easily distributed by email. This allows for sharing your mechanical linkage creations with others.

### What is the age rating for MechGen FG?

MechGen FG has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger individuals interested in mechanical concepts.

### Does MechGen FG have ads?

No, MechGen FG does not contain advertisements. As a paid application, it provides an ad-free experience for users.

### What is the user feedback on MechGen FG?

MechGen FG has a rating of 3.5 stars based on 4 user reviews. This suggests a generally positive but mixed reception from its user base.

## Version history (last 5 releases)

### 3.3 — 2017-04-26

This update from Apple will improve the functionality of this app. No new features are included.

-Added permissions requesting for iOS 10.
-Added new icons for iPad.

### 3.2 — 2016-10-12

Fixed an issue that caused crashes when generating a data report email.

### 3.1 — 2015-12-02

-Fixed an issue where movies were not rendering correctly on iPhones.

### 3.0 — 2015-11-07

- Updated the alert views for iOS 9
- Fixed an error where the movies were rendering incorrectly on iPhones.

### 2.02 — 2015-08-21

-Fixed an issue where the keyboard would not be dismissed when changing the number of iterations.

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## More apps by John McCarthy

- [MechGen Suspension](https://appshunter.io/ios/app/mechgen-suspension/id960884317)

All apps by John McCarthy: https://appshunter.io/developer/915956173

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-07.*