I found a description of the app in a builder magazine and immediately searched for the program. After downloading to my iPhone I scanned through the manual and was amazed at the time-saving solutions to many of my everyday layout chores. Being a second generation Home Builder and having labored through the repetitive layout calculation of stairs, rails, rafters, etc. I was amazed at how fast and easy this program made the normally redundant calculations. The only minor drawback I found was the documentation didn’t give complete and thorough directions about some of it’s features. I received an email back from one of the developers with an answer to one of my questions within a few hours of having sent it. I wish all apps had this kind of customer service.