Loved the app at the start. Great deals. After the last update, everytime I've tried to use it they tell me over the speaker "It says your code is invalid." I've tried at 3 different locations. I've tried uninstalling and reinstalling. I've tried using on cell data and on Wi-Fi. No luck. Maybe it's good that it stopped working because I've bought more McDonald's in the last three months than the whole 3 YEARS previous. Maybe I'll try again in a few months.