What is Reddit's opinion of FrameDesign?

From 3.5 billion Reddit comments

I use FrameDesign and BeamDesign from the guys at LetsConstruct, quite simple and powerful.

A friend of mine is fan of the apps from LetsConstruct. They seem to make good calcs.

Yo en su momento lo único que había encontrado era esta app: https://play.google.com/store/apps/details?id=nl.letsconstruct.framedesign