# GD&T

> GD&T (iPhone/iPad app by Carl Zeiss AG.)

- Source: https://appshunter.io/ios/app/gdt/id627973440 (this page in markdown: same URL + `.md`)
- Developer: [Carl Zeiss AG](https://appshunter.io/developer/488066215)
- Category: Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 56 MB
- Languages: American English
- Released: 2013-04-23
- Data updated: 2026-03-05
- User reviews in markdown: https://appshunter.io/ios/app/gdt/id627973440/reviews.md

## What is GD&T?

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, …)
-25 animations
-Basic information
-Form tolerance
-Profile tolerance
-Position tolerance
-Orientation tolerance
-Runout tolerance


## Version history (last 5 releases)

### 3.0.1 — 2022-02-22

- Content adjustments
- Minor bug-fixes

### 2.0.8 — 2019-10-22

- Brandnew App-Design
- Reworked Content and Videos
- Updated Standards Directory
- Minor Bugfixes

### 2.0.7 — 2019-10-17

- Brandnew App-Design
- Reworked Content and Videos
- Updated Standards Directory
- Minor Bugfixes

### 2.0.5 — 2018-09-25

Added new content and fixed some minor bugs.

### 2.0.3 — 2017-02-01

Minor bug fixes and a new ebook link

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## More apps by Carl Zeiss AG

- [Light Lab](https://appshunter.io/ios/app/light-lab/id488066212)
- [GD&T HD](https://appshunter.io/ios/app/gdt-hd/id627968870)
- [ZEN browser](https://appshunter.io/ios/app/zen-browser/id665543029)
- [Labscope Material](https://appshunter.io/ios/app/labscope-material/id688689220)
- [VR ONE AR](https://appshunter.io/ios/app/vr-one-ar/id942844528)

All apps by Carl Zeiss AG: https://appshunter.io/developer/488066215

## Related topics

[toleranbearingtools](https://appshunter.io/ios/topics/toleranbearingtools)

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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 2026-03-05.*