Build me an app utilizing AR &/or Lidar technology -- 2

DO NOT SEND CUT AND PASTE SPAM REPLIES. I DO NOT CARE FOR YOUR PAST PROJECTS UNLESS THEY ARE SPECIFICALLY RELATED TO MY NEEDS. EXPLAIN HOW YOU WOULD BEGIN TO ATTACK THE TASK. In a nutshell i want to develop an app to scan and map out accurately the scanned 3D subject. I am open to ideas, sugesstions, etc. Skills in biometrics app development or using sdk's to add to an app will be fine. I also will need supporting websites for the app. There is a lot of latitude on design. I will be blunt. If you know what I am looking for ask away. If your questions are remedial then dont bother. I need an app to precisely measure the bodies of adults and children. The concept is the same but will have extreme details for certain bodies to scan, such as someone with an prosthesis or a non - symmetrical body. It maybe simple as sizing an 8yr old to sizing a chest to determine bra size after a mastectomy. All design and programming will be done by the sub but they will have to sign an ND and all work will be owned by us.