# GD & T Guide vs Geometry Calculator++

The clearest difference is review sentiment: Geometry Calculator++ at 100% against GD & T Guide's 20%. Geometry Calculator++ also leads on in-app purchases (none vs 2) and update cadence (fortnightly vs every 5 months). GD & T Guide's advantage is price (Free vs $2.99) and iOS requirement (11.0 vs 15). On ratings volume, ads and device support there is nothing between them.

GD & T Guide is free to download; Geometry Calculator++ costs $2.99 up front. GD & T Guide sells 2 one-off in-app purchases. Geometry Calculator++ asks for nothing beyond the download.

Geometry Calculator++ holds the better App Store score, 3.4 against 3.0. Both are backed by a comparable volume of ratings — 9 and 5 respectively. Written reviews point the same way: 20% of GD & T Guide's written reviews are positive against 100% of Geometry Calculator++'s.

GD & T Guide ships an update every 5 months, Geometry Calculator++ fortnightly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | GD & T Guide | Geometry Calculator++ |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [3.0 (9 ratings)](https://appshunter.io/ios/app/gd-and-t-guide/id1374135977/reviews) | **[3.4 (5 ratings)](https://appshunter.io/ios/app/geometry-calculator-plus-plus/id1515851137/reviews)** |
| Number of ratings | **9** | 5 |
| Positive reviews | 20.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 55 MB | 1 MB |
| Requires iOS | **11.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [GeoTol Inc.](https://appshunter.io/developer/511287932) | [Dogahe](https://appshunter.io/developer/468657946) |

## What reviewers say

### GD & T Guide

[App page](https://appshunter.io/ios/app/gd-and-t-guide/id1374135977)

This app provides a digital version of a pocket guide to Geometric Dimensioning and Tolerancing (GD&T). It explains GD&T symbols, their application on engineering drawings, and common inspection techniques. It also includes tools for converting measurements and calculating position tolerances.

**Highlights:** GD&T symbol descriptions, Engineering drawing application, Inspection techniques, Reporting methods, Measurement conversion tool, Fastener formula calculator

**Features:** macOS Compatibility

**In-app purchases (2)**

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


### Geometry Calculator++

[App page](https://appshunter.io/ios/app/geometry-calculator-plus-plus/id1515851137)

This app helps you solve for the parameters of various geometric shapes and visually draws them. It supports multiple triangle types, squares, rectangles, circles, and regular polygons. Available for iPhone and iPad with a single purchase.

**Highlights:** Solves geometric parameters, Draws geometric shapes, Supports triangles, squares, rectangles, circles, and polygons, Universal app for iPhone and iPad, Single purchase

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GD & T Guide free?

GD & T Guide is free to download, with in-app purchases available.

### Is Geometry Calculator++ free?

Geometry Calculator++ costs $2.99, with no in-app purchases.

### Which has better reviews, GD & T Guide or Geometry Calculator++?

Geometry Calculator++ is rated higher. GD & T Guide averages 3.0 out of 5 from 9 ratings, while Geometry Calculator++ averages 3.4 from 5 ratings.

### Do GD & T Guide or Geometry Calculator++ have ads?

Neither GD & T Guide nor Geometry Calculator++ shows ads.

### Which is updated more often, GD & T Guide or Geometry Calculator++?

GD & T Guide ships an update every 5 months, and Geometry Calculator++ fortnightly. Most recently, GD & T Guide was updated on November 2, 2026 and Geometry Calculator++ on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*