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? How long does it take to get a sensor? What is my group name? How much data will it take to download the Propeller app? How many sensors do I need? Comments 0 comments Please sign in to leave a comment.