What's New

- Added sizes and modifiers
- Added datum and tolerance direction limitations
- Added tolerance indications for associations and filters
- Added additional drawing entries
- Minor bug-fixes

App Description

Learn, interpret and inspect GD&T according to ISO 1101. This app describes a large range of definitions of geometric dimensioning and tolerancing and supports engineers and employees as a multimedia reference book. As part of operative education, this app shows relationships and makes it easier to understand the right handling of form and position tolerances in practice.
This app explains the most important definitions of GD&T and its interpretation by examples (straightness, roundness, flatness, cylindricity, profile of a line, parallelism, squareness, angularity, position, concentricity, symmetry, circular runout, …)
-52 animations
-Basic information
-Form tolerance
-Profile tolerance
-Position tolerance
-Orientation tolerance
-Runout tolerance

iPad Screenshots

(click to enlarge)

GD&T HD pro screenshot 1 GD&T HD pro screenshot 2 GD&T HD pro screenshot 3 GD&T HD pro screenshot 4 GD&T HD pro screenshot 5

App Changes

  • March 31, 2015 Initial release
  • May 02, 2015 New version 1.1
  • October 15, 2015 New version 2.0.1
  • June 13, 2019 New version 2.0.5
  • November 04, 2019 New version 2.0.8
  • September 16, 2023 New version 3.0.1
  • September 16, 2023 Price increase: $7.99 -> $9.99