# GD & T Guide

> Digital GD&T pocket guide with symbol explanations and calculation tools. (iPhone/iPad app by GeoTol Inc..)

- Source: https://appshunter.io/ios/app/gd-and-t-guide/id1374135977 (this page in markdown: same URL + `.md`)
- Developer: [GeoTol Inc.](https://appshunter.io/developer/511287932)
- Category: Education
- Price: Free with in-app purchases
- Rating: 3.00/5 from 9 App Store ratings · 5 written reviews indexed
- Age rating: 17+
- Requires: iOS 11.0 · 55 MB
- Languages: American English
- Released: 2018-04-27
- Data updated: 2026-06-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/gd-and-t-guide/id1374135977/reviews.md

## What is GD & T Guide?

This is an App version of our best-selling printed pocket guide on Geometric Dimensioning and Tolerancing (GD&T). In its 77 pages, it will give a description of GD&T symbols and their use on engineering drawings. Common inspection techniques and reporting methods are also included in the descriptions. 
There is a conversion app for X, Y rectangular measurements to position tolerance zones.
There is a fixed and floating fastener formula App to calculate position tolerances using the standard screw and drilled clearance holes. Available in both inch and mm.

## Key features

- GD&T symbol descriptions
- Engineering drawing application
- Inspection techniques
- Reporting methods
- Measurement conversion tool
- Fastener formula calculator

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Geometric Dimensioning and Tec | $3.99 | one-time |
| Full Book | $1.99 | one-time |


## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/gd-and-t-guide/id1374135977/reviews.md

### 2/5 — Poorly Designed App

*2022-09-03*

This was thrown together without regard for the devices it used on. The content, which appears to be a mirror of thr authors book, is unreadable on iphones and ipads. Too bad no one thought of the UX.

### 1/5 — Requesting money twice

*2021-04-15*

I bought the app a few years back, it was working fine, but now it's asking for money again. Do they changed something. Why I need to pay again

### 2/5 — In app purchases

*2021-02-22*

So I bought this app some years ago worked fine used to be able to go into it click on any of the features and now it wants to charge me for any of the additional things that I used to already own 

Is this a whole new program why do I have to pay twice for some thing already paid for once?

### 1/5 — Disappointed

*2020-03-07*

This app worked great on my Samsung Galaxy but when I switched over to an iPhone, nothing worked.  When I select a feature it kicks me out of the app.  I got this app after attending a conference held by Scott. Hope he gets it fixed.

### 5/5 — Works..

*2018-08-10*

Works great

## Frequently asked questions about GD & T Guide

### What is GD & T Guide?

GD & T Guide is a mobile application that serves as a digital pocket guide for Geometric Dimensioning and Tolerancing (GD&T). It offers explanations of GD&T symbols, their usage on engineering drawings, and common inspection methods.

### What kind of calculations does GD & T Guide offer?

GD & T Guide includes a conversion app for X, Y rectangular measurements to position tolerance zones. It also features a fixed and floating fastener formula app to calculate position tolerances for standard screw and drilled clearance holes.

### What is the GD & T Guide's age rating?

GD & T Guide has an age rating of 17+, making it suitable for adults and older teenagers who require technical engineering knowledge.

### Is GD & T Guide available on Android?

Based on the provided data, GD & T Guide is available for iPhone, iPad, and iPod, indicating it is an iOS application. Support for Android devices is not specified.

### How often is GD & T Guide updated?

The latest version of GD & T Guide was released on June 24, 2021. The app was initially released on April 27, 2018, suggesting updates may not be very frequent.

### What is the user rating for GD & T Guide?

GD & T Guide has a user rating of 3.0 stars based on 9 ratings. This indicates a mixed reception from its user base.

### Does GD & T Guide have ads?

No, GD & T Guide does not contain advertisements. The app is free to download and use, with in-app purchases available.

### What is the price of GD & T Guide?

GD & T Guide is available for free download. While the core app is free, there are in-app purchases available for additional features or content.

## Version history (last 4 releases)

### 3.1 — 2021-06-24

Speed and UI Performance Improvement

### 3.0 — 2021-05-16

Update New UI

### 2.0 — 2020-12-27

Issue resolved
Update In app purchased product

### 1.0 — 2018-04-25

No release notes.

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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 2026-06-01.*