Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

Gear & Engine Calculator Screenshots

iPad

iPhone

About Gear & Engine Calculator

The Gear and Engine Calculators app is a very useful utility to give an estimate of vehicle’s (car, truck, motorcycle) gear ratio. Calculators are included and additionally supplied are helpful converters.

Calculators 

- Gear Ratio 
- Gear Selector
 - Air Filter Height 
- Ring and Pinion Ratio

Converters 

- Tire Size 
- Flow Rate 
- Pressure Units 
- Airflow Converter 
- Temperature Conversion

Area Converters

• Square Inches and Shorter Conversion
• Square Feet & Yards & Meters Conversion

Distance Converters

• Inches & Centimeters & Millimeters Conversion
• Feet & Yards & Meters Conversion
• Nautical Miles, Statue Miles and Kilometers Conversion

Volume Converters

• US/Imperial to Metric Units Conversion
• Metric to US/Imperial Units Conversion
• Inches & Centimeters Volume Conversion
• Feet, Yards, & Meters Volume Conversion

This app features:

• Send your calculations or conversion by email
• Universal App (iPhone, iPod Touch, and iPad)
• Retina Display graphics
• Fast app switching
• Automatically Saves Your Inputs
• All iPhone screen are supported

No network connectivity required.

The application is a universal app compatible with the iPhone, iPod Touch, and the iPad.

What's New in the Latest Version 7.4

Last updated on Feb 9, 2019

Old Versions

Bug fixes to prevent crashing

Version History

7.4

Feb 9, 2019

Bug fixes to prevent crashing

7.3

Feb 23, 2015

Updated for iOS 8
Support for iPhone 6 and 6+ screen sizes

7.2

Sep 15, 2014

Bug Fixes

7.1

Jan 12, 2014

Bug Fixes
Smaller App Size & Download Size

7.0

Oct 5, 2013

Updated interface to be easier to read for iOS 7

6.1

Sep 19, 2013

Added support for iOS 7

6.0

Nov 9, 2012

Added support for the iPhone 5 and iOS 6

5.0

Jul 4, 2012

Bug Fixes
Added Support for International Number Separators
Updated Icon
Updated Name

4.1

May 1, 2012

Updated for iPad Retina Display
Fixed Short Distance Calculation from Nanometers to Micrometers

4.0

Mar 7, 2012

Feature Additions
Extra Calculators
Improved Overall Layout and Design
Bug Fixes

3.1

Nov 15, 2011

Updates for iOS 5
Corrected typos

3.0

Oct 24, 2011

Updates for iOS 5
Fixed textbox transparency bug in iOS 5

2.00

Sep 16, 2011

Fixed small memory leaks.
Interface improvements on iPad
Added support for international number separators
Fixed Typo's
Updated Email Templates

1.03

May 12, 2011

Fixed unit conversion bug for distance conversion between feet and yards on the Distance Calculator.

1.02

Apr 27, 2011

Updated background for iPad's higher resolution

Updated calculate button for better contrast with background

Added quick help

1.01

Apr 2, 2011

Updated to Higher Resolution backgrounds for iPad display.

Bug Fix: the missing background for Airflow Converter view has been added for overall consistency.

1.00

Mar 21, 2011

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