A scale you can check. Every quantity in a takeoff is a click multiplied by a scale, so the scale comes first. MeasureSet sets it per sheet in one of two ways: click both ends of a printed dimension and type its real length, or pick a standard architectural, engineering, or metric scale from the Scale box. Standard scales assume the PDF is the full printed size of the drawing, so check one known dimension with the segment tool either way. The status bar shows the scale as its standard name, or as a plain ratio such as 1:105 when no standard scale matches. A quarter-inch drawing on a 24 by 36 inch sheet, shrunk to fit 11 by 17 inch paper, reads about that way, so an odd ratio deserves a second look.
Tools that match the drawing. The length tool follows a run through as many corners as it needs, and Shift keeps 45-degree steps. The area tool takes corners one by one, or a dragged rectangle. The room tool adds a room's area from one click inside it, as long as the room is closed on the drawing. Counts go in groups, and the segment tool measures a single two-point distance. New points snap to the corners of other marks, and the Select tool drags any corner or whole mark into place.
Labels that carry the trade math. Give a label a height and every length with that label shows wall area. Give an area label a depth for volume or a roof slope for sloped area, and add a waste percent to any label. The settings travel with the label, and the label library keeps your labels for the next job on this PC.
Totals and output. The Totals list groups marks by tool and label for each sheet and for the whole set. The .xlsx export has a Marks sheet with one row per mark and a Totals sheet, the .csv holds the same two tables, and the marked-up PDF shows each marked sheet with its marks drawn over it, followed by a totals table. A project can hold several PDFs, and Open > Revision to compare overlays an addendum in red and blue.
What it leaves out on purpose. MeasureSet is a takeoff ruler, not an estimating suite. It has no assemblies, no cost database, and no cloud collaboration, and it does not search the drawing for symbols, so counts are clicks. There is no circle or arc tool, snapping does not reach the drawing's own lines, and each sheet has one scale. It opens PDF files only.
Where your files stay. It works on your PC with no account and no telemetry, opens only the PDFs you pick, and never writes over a plan PDF. Remember that a measurement is only as good as the calibration and the drawing behind it, so the check of one known dimension is worth the minute it takes.