GD&T HD vs SLATE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GD&T HD
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.
- ISO 1101 GD&T definitions
- Multimedia reference book
- Practical interpretation examples
- Form and position tolerance handling
- 25 animations
- Basic information
Read full descriptionHide full description
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
SLATE
Read full descriptionHide full description
Slate is a clean, modern PDF annotation app built for professionals, students, and anyone who works with documents. Import PDFs, review files, add annotations, sign documents, and export completed work—all from your iPhone or iPad. Whether you're reviewing contracts, completing forms, marking up plans, or organizing paperwork, Slate helps you stay focused with a simple, distraction-free workspace. FEATURES • Import and annotate PDF documents • Add text anywhere on the page • Create and place signatures • Insert dates, initials, and checkmarks • Highlight important information • Draw freehand with customizable pen tools • Add stamps and annotations • Save your progress and revisit documents later • Export and share completed PDFs • Designed specifically for iPhone and iPad BUILT FOR EVERYDAY WORK Slate is ideal for: • Business professionals • Contractors and field teams • Students and educators • Real estate professionals • Office administration • Anyone who regularly works with PDF documents SIMPLE BY DESIGN Slate was designed around one goal: making document markup fast and intuitive. Every feature is focused on helping you review, complete, and share documents without unnecessary complexity.
Screenshots
Verdict
The clearest difference is iOS requirement: GD&T HD at 15.0 against SLATE's 26.5. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | GD&T HD | SLATE |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 15.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 56 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Carl Zeiss AG | Danielle Dockery |
In-app purchases
GD&T HD
No in-app purchases
SLATE
No in-app purchases









