I need a APP developer to create my app to help carpeters and handymen to build timber pitched roofs, called Rafter Master

Design me an app that is used by carpenters and handymen to assis them in the process to tich a traditional timber roof frame and set up all bevels using a builders square using our calculating some Ai created imaging and design our LOGO a Mean Ford Ranger The app requires accurate calculations and diagrams and instructions with a Scientific calculations. I need good looking male and female models x 4 wearing carpenters nailbagags and using their hammer and nails on a single storey level ceiling timber pitched rafters house site the house and people are Australian or similar