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Engineering Toolbox

By Action!

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Engineering Toolbox is an easy rule, intuitive, powerful and fully adjustable to the size of the mechanical joints with bolts and keys, on the Metric and Whitworth standards.
Inside the application, a converter tool will help you in the mechanical working, converting lenght, pressure, temperature and a table with conventional conversion for pipes / flanges.

Available in english and italian.

All Metric System size of bolts useful for designing, work, install in electronic sliding rule easy and quick to use.

All sizes of threads and their characteristics in a simple slide rule suitable for all professional user in the industrial sector.

All dimensions of keys and their sizes in a simple slide rule suitable for all professional user in the industrial sector.

The tool allows you to calculate the tightening torque to apply to bolts, based on seal type and pressure.

- Lenght: simple tool for lenght conversion
- Pipes / flanges: a table that shows the conventional conversion between in/NPS and mm/DN
- Pressure: tool for pressure conversion
- Temperature: easy temperature conversion tool
- Volume: easy volume conversion tool
- Power: easy power conversion tool

All contents are approximate and can not be used without being validated by a professional Engineer. Action! srl declines any liability you may incur as result of using this application. Help us to improve this app: please suggest us new tool and malfunctions occurred during the use, writing to

What's New in Version 1.5

- iPhone 5 compatibility
- iOS 6 compatibility

iPhone Screenshots

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Customer Reviews


I can see minor use for it if you do a lot of but and bolt calculations other than that seems pretty useless

iPhone 7 user

This application needs updating, and does not work on the current iOS. Save your money and hold off until it is updated.

Engineering Toolbox
View in iTunes
  • $4.99
  • Category: Productivity
  • Updated:
  • Version: 1.5
  • Size: 24.3 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 4.3 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

We have not received enough ratings to display an average for the current version of this application.
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