Why do you need my address? Mandy July 31, 2017 19:00 Updated Follow For patients who qualify, Propeller sends out 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 long does it take to get a sensor? How do I know if I have an account? How much data will it take to download the Propeller app? Comments 0 comments Please sign in to leave a comment.