I like how easy it was for me (as an amateur)to use this program in order not only measure but actually create 3D models of my designs which were previously impossible with hand measurement alone! The app requires iOS 11+ so make sure your device has up-date installed before usingTake Off Express App!! This does exactly what we need - takes off our existing CAD drawing files into dimensions allowing us access them at anytime anywhere via internet connection even without having physical copies available locally.