https://www.chick-fil-a.com/OfficialRules Between August 31, 2017 and September 30 Download the Chick-fil-A App for iOS or Android for your choice of a Chick-fil-A® Chicken Biscuit, Egg White Grill or Hash Brown Scramble Bowl. Valid for new and existing users. Offer must be redeemed by September 30, 2017 at 10:30 A.M. Local Time. –locator