# GD&T HD vs SolverPad

The clearest difference is in-app purchases: GD&T HD at none against SolverPad's 1. GD&T HD also leads on ads (none vs shown). SolverPad's advantage is update cadence (weekly vs every 11 months) and device support (3 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. SolverPad sells 1 one-off in-app purchase. GD&T HD asks for nothing beyond the download.

GD&T HD ships an update every 11 months, SolverPad weekly. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | GD&T HD | SolverPad |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/gd-and-t-hd/id627968870/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Weekly** |
| Monetization | Free | — |
| Size | 56 MB | 35 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Carl Zeiss AG](https://appshunter.io/developer/488066215) | [ASAPP STUDIO](https://appshunter.io/developer/1338092352) |

## What reviewers say

### GD&T HD

[App page](https://appshunter.io/ios/app/gd-and-t-hd/id627968870)

This app serves as a multimedia reference for understanding geometric dimensioning and tolerancing (GD&T) according to ISO 1101. It provides definitions, examples, and animations to help engineers and employees interpret and inspect GD&T concepts like form, position, and orientation tolerances.

**Highlights:** ISO 1101 GD&T definitions, Multimedia reference book, Practical interpretation examples, Form and position tolerance handling, 25 animations, Basic information

**In-app purchases:** none


### SolverPad

[App page](https://appshunter.io/ios/app/solverpad-notepad-calculator/id6754253396)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Version | $0.99 | one-time |


## Frequently asked questions

### Is GD&T HD free?

GD&T HD is free to download, with no in-app purchases.

### Is SolverPad free?

SolverPad is free to download, with in-app purchases available.

### Do GD&T HD or SolverPad have ads?

SolverPad shows ads; GD&T HD does not.

### Which is updated more often, GD&T HD or SolverPad?

GD&T HD ships an update every 11 months, and SolverPad weekly. Most recently, GD&T HD was updated on November 1, 2026 and SolverPad on November 8, 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.*