I downloaded this app for the first time but when I tried to sign up it keeps saying invalid email and will not let me sign up to use the app. I even tried the Google sign in option and it still says the same thing. invalid email. Burger King and Wendy's apps are also garbage they work when they want. Unfortunately the McDonald's app won't even let me sign up. I miss the good old days of coupons. at least you knew when you went to the register; the coupon would work......