by Roof cutter
I am a carpenter and I cut roofs, when there is a need for a conventional roof. I have a construction master calculator and this app is just like the real thing. For those who need instruction, if you press a key and hold it a new screen will pop up and give you a brief explanation. O must say again if your working on a conventional roof this is a 5 star app. I wish there was a greater need for conventional roofs as apposed to trusses.