There’s no app for that. There are some things that just can’t be done exactly right in the digital realm. Like proper measuring (fans of laser measuring tools, pipe down, you know what I mean). So this rugged looking Measuring Tape iPhone Case design concept simply adds a measuring tape to the back of your iPhone case. Could you get a better measuring tape by just gluing a real one on to the back? Probably, but it wouldn’t slip into your pocket as easily. No matter, it’s just a design and not an actual product.