A PDF tool made for drawing sets
Open A0 sheets smoothly, compare revisions on top of each other, stamp and sign with a smart card, and turn the submission set into PDF/A.
Four jobs, one app
Revision compare
See which sheets changed between R2 and R3 and where; take the report to the meeting.

Stamp, sign, annotate
"Certified copy" and "Approved" stamps, measurement and shape markups, page notes. Embedded permanently.

Submissions to authorities
Merge sets, reorder pages, sign PAdES with a smart card, save as PDF/A-2b.

Ask the specification
What does the 300-page specification say about stair widths? Page-referenced answers, document never leaves.

Rendering built for large sheets at high resolution.
Compare works on words and pixels, so drawing differences show.
Presentation mode for site meetings with laser and pen.
Built by an architect, for architects.
Which plan? Pro seats for the office; the free viewer on site computers.
Try it; the document never leaves
The free edition includes viewing, page tools, compare and presentation. Pro is $3 a month or $29 a year per seat.