Questions,answered.

A desktop app for reviewing, marking up and taking off drawing sets, built for large sets and for every discipline on a project.

Architects, structural and civil engineers, mechanical, electrical, hydraulic and fire engineers, estimators, builders and document controllers. Find your discipline.

Windows 10 and 11.

Large ones. It reads only the sheets you look at: an 800-page, 49 MB set opens reading 1.1 MB, with the first sheet on screen in 480 ms. Performance.

Yes, both ways. Standard PDF comments open as markups, and ScaleSet PDF saves its own as standard comments; untouched ones stay byte for byte. PDF compatibility.

Yes. Snapping latches onto the PDF's own line work - ends, midpoints, intersections, arc centres - and a room can be filled from the drawing in one click. Measurement.

Yes, along with cable containment: ducts with their airflow and velocity, pipes with their grades and inverts, trays with their fill, and a schedule of every fitting. Duct, pipe and tray.

Yes. Tool set files from other PDF markup apps import directly. Markup.

Yes, as a real .xlsx workbook with SUMIFS and COUNTIFS totals, plus CSV and a PDF report.

Reading is: download it and open, read, search and print any PDF with no account. Markup, takeoff and editing are licensed to teams, a seat per person, one computer at a time. Download · Teams and licences.

Yes. A licensed computer runs for up to three days between check-ins.

No. Drawings stay on your computer; the licence check carries only your session, which computer, its name and the app version. Security.

Only if you connect your own AI assistant; ScaleSet PDF calls no AI service itself. AI assistant.