FREE Fries at McDonald's on July 13th with the McDonald's App

July 13th is National Fry Day! Celebrate with a FREE Medium Order of Fries at McDonald's with the McDonald's app! No purchase necessary. To get your free fries on Tuesday (7/13), you need to download the McDonald’s app for iOS or Android devices, opt-in to MyMcDonald's Rewards and add the deal for medium fries to your cart.