Offers and daily deals can vary by account and region. On Tuesday, there's a daily drop for a free Quarter Pounder with Cheese with a $1 minimum purchase on the chain's app.
Don't have the app? McDonald's says on its website that you'll get free large Fries when you download the app and join MyMcDonald’s Rewards. Then after your first purchase, you get the choice of Hash Browns, Vanilla Cone, McChicken or a Cheeseburger for free.