Their app uses geofencing to determine the user’s location to a McDonald’s, and if they are within 600 feet, the deal will be enabled

Their app uses geofencing to determine the user’s location to a McDonald’s, and if they are within 600 feet, the deal will be enabled https://t.co/EYF3Fxp5Vt

— Fast Company (@FastCompany) December 8, 2018