Seriously this is an architects dream come true.

This app is insane and you can do almost anything like real trace. You can even move the paper itself. This is exactly what I need for design, worksessions, site visits and markups.
INCREDIBLE and a MUST for every architect.
Ps. Canary yellow trace is a killer touch and the setting of scale is very cool.

Architect NYC about Morpholio Trace - Sketch CAD