You deserve a 25 cent Quarter Pounder with cheese -- or any other classic sandwich -- when you buy one at McDonald's.
Use a coupon in the "Deals" section of chain's app good at participating restaurants through March 31.
Get the deal by downloading the free app, joining and scanning the offer at registers. There are new offers each week, including a free any size soft drink with purchase of a large fry, or a $1 off new bacon cheese fries.
Go to McDonalds.com/App for the deal.