# Roughness vs GD&T Check

The clearest difference is device support: Roughness at 3 against GD&T Check's 1. Roughness also leads on iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Roughness | GD&T Check |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gd-and-t-check/id6801021289/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | — |
| Monetization | — | Free |
| Size | 26 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Carl Zeiss AG](https://appshunter.io/developer/488066215) | [Alec Flavio Cardenas](https://appshunter.io/developer/6787530608) |

## What reviewers say

### Roughness

[App page](https://appshunter.io/ios/app/roughness/id1356085703)

**In-app purchases:** none


### GD&T Check

[App page](https://appshunter.io/ios/app/gd-and-t-check/id6801021289)

This app helps mechanical engineering students verify their Geometric Dimensioning and Tolerancing (GD&T) callouts. It provides instant validation against ASME Y14.5-2018 rules, clear explanations of tolerances, and a comprehensive symbol reference library. All features work offline, making it a convenient study tool.

**Highlights:** GD&T callout validation, Plain-English explanations, Symbol reference library, ASME Y14.5-2018 rules, Offline functionality, Saved history log

**In-app purchases:** none


## Frequently asked questions

### Is Roughness free?

Roughness is free to download, with no in-app purchases.

### Is GD&T Check free?

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

### Do Roughness or GD&T Check have ads?

Neither Roughness nor GD&T Check shows ads.

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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.*