# iGearbox

> Interactive educational app for calculating gearbox ratios and simulating gear trains. (iPhone/iPad app by Motionics LLC.)

- Source: https://appshunter.io/ios/app/igearbox/id451320370 (this page in markdown: same URL + `.md`)
- Developer: [Motionics LLC](https://appshunter.io/developer/424498959)
- Category: Education, Utilities
- Price: $4.99
- Rating: 3.00/5 from 6 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 12 MB
- Languages: American English
- Released: 2011-07-28
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/igearbox/id451320370/reviews.md

## What is iGearbox?

iGearbox is an ideal educational App to interactively calculate the gearbox ratio for regular and planetary gearboxes. 

It offers two main tools: 

1) Gear Train Tool
 A touch drag & drop-based design area that you can select the gears from the library, assemble, and calculate the ratio and speeds of each gear and the whole gear train.

2) Planetary Gear Set Tool
 An interactive and dynamic graphic based environment to learn about the planetary gear sets with different configurations and calculate ratios and the gearbox output. 

User selects the stationary, the input and the output parts, and observes the motion of gear set components in action. Entering the number of ring and sun teeth, the app calculates the ratio and the gearbox output for each configuration. Also, the symbolic ratio relation of the gearbox will be shown for each configuration.

   
******** Features *********

Gear Train Tool:
- Touch/ drag & drop-based design environment
- Multiple gear train configuration (up to 8 gears in train)
- Ratio and speed calculations for each gear and the whole gear train

Planetary Tool:
- 6 different configurations. i.e., each component (ring, sun, planets arm) can be selected as stationary, input, or output components  
- Dynamic interactive motion of the components for each configuration (Animations)
- Symbolic ratio equation for each configuration
- Ratio calculation for each case based on the sun and ring # of teeth
- Output calculations based on the gear configuration and specification
- Planetary gear set formulations as a help document
- Adjustable rotating speed for the animations of the gearset
- Dropbox upload of screenshot and data 
*******************************
iGearbox is a perfect tool for instructors to teach and show the basics and fundamental concepts of regular and planetary gearboxes. Connecting the device to the monitor or projector, instructors can present the animations of the gearbox for different configurations.
*******************************
iGearbox is a universal App that works on iPad, iPhone, and iPod Touch. You will be able to install the App on all these devices when you buy one copy.

Disclaimer:

iGearbox is developed to be used for educational purposes.  Although the calculations done by this App were made with great care, it may contain errors or inaccuracies. Using the results of the calculations is the sole responsibility of the user.

## Key features

- Interactive gear train design
- Planetary gear set simulation
- Ratio and speed calculations
- Multiple gear train configurations
- Dynamic component motion animations
- Symbolic ratio equations
- Dropbox data upload

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/igearbox/id451320370/reviews.md

### 3/5 — NC AGGIE

*2014-12-04*

This app hangs up when you try to use dropbox. Then I have to remove it and reinstall it. Please fix.

### 3/5 — Good for the basics

*2013-04-24*

I wish that there were more options when building a gear train, like the ability to have a rotating arm instead of fixed axial rotation.  This addition would greatly increase the versatility of the app.  The planetary gear animation is nice to get a basic understanding of the motion, but I would like the ability to add more planets to the system!

### 5/5 — Very Creative and Useful

*2012-03-21*

I really love the way it helps you understand how the planetary or regular gearbox work. Very handy and useful to find the ratio of a gear set with just simply touching and building the gear set in few seconds..
I love the animation of the planetary gearbox!

### 1/5 — Rip off!

*2012-01-01*

Rather than the fact that this app has NO significant features it also has no significant physics or amount of accuracy. Do not download this app its a waste of money...its only has one planetary gear and the editor allows only to connect 5 gears....shame on u developer for the amount of money paid....you are to greedy.... Stay away from this app

### 1/5 — Not worth $5

*2011-12-12*

This app does nothing. I was expecting to be able to design different gears. It basically is an animation and PDF. I wish there was a way to get my money back.

## Frequently asked questions about iGearbox

### What is iGearbox used for?

iGearbox is an educational app designed to help users interactively calculate gearbox ratios for both regular and planetary gearboxes. It offers tools for designing gear trains and simulating planetary gear sets.

### How does the Gear Train Tool in iGearbox work?

The Gear Train Tool uses a touch drag-and-drop interface, allowing you to select gears from a library, assemble them into a train (up to 8 gears), and calculate the ratio and speeds for each gear and the entire train.

### Can iGearbox simulate planetary gear sets?

Yes, iGearbox features a Planetary Gear Set Tool with 6 different configurations. You can select stationary, input, and output parts, and observe the dynamic motion of components while calculating ratios and outputs.

### What are the educational benefits of iGearbox?

iGearbox is ideal for instructors to teach fundamental concepts of gearboxes through interactive simulations and animations. It can be connected to a projector for presentations, making complex mechanics easier to visualize.

### Is iGearbox available on multiple devices?

Yes, iGearbox is a universal app compatible with iPad, iPhone, and iPod Touch. Purchasing one copy allows installation on all supported Apple devices.

### What is the price of iGearbox?

iGearbox is a paid application priced at $4.99. This one-time purchase grants access to all its features on supported devices.

### How often is iGearbox updated?

The latest version of iGearbox is 3.1, and it was last updated on June 5, 2024. Updates typically include improvements and bug fixes to enhance user experience and functionality.

### What is the user rating for iGearbox?

iGearbox has a rating of 3.0 stars based on 6 user ratings. This indicates a mixed reception, with some users finding it valuable for its educational and calculation features.

## Version history (last 4 releases)

### 3.1 — 2024-06-05

Updated for the latest iOS version

### 3.0 — 2016-02-09

- Added Support for iPhone 4'' screen and bigger
- Fixed Dropbox freezing issue

### 2.0 — 2011-08-11

- Dropbox feature to upload screenshot and data of the App to your Dropbox account
- Animation Speed Slider control
- More help and documentations
- Link to other technical Apps developed by Motionics

### 1.0 — 2011-07-28

No release notes.

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## More apps by Motionics LLC

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All apps by Motionics LLC: https://appshunter.io/developer/424498959

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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 2026-08-26.*