Why do you need my address? Mandy July 31, 2017 19:00 Updated Follow For patients who qualify, Propeller ships our sensors directly to your home. We need your address to do that! Related articles Why do you need my email address? What is my group name? How much data will it take to download the Propeller app? How many sensors do I need? How do I sync my sensor with my smartphone or tablet for the first time? Comments 0 comments Please sign in to leave a comment.