Burger King wants people to download its app. So it’s sending them to McDonald’s for access to a one-cent Whopper.

Here’s how it works: If you’re within 600-feet of a McDonald’s you can unlock a deal for a penny Whopper using the Burger King app. The app then offers directions to a nearby participating Burger King, where you can pick up the burger. The company announced the deal on Tuesday. It runs through December 12, and customers can only access it once.
Burger King’s not the only fast food chain trying out creative ways to get people to download its mobile app. McDonald’s recently ran a $1 fries promotion through its app, and Wendy’s often offers deals through its app as well. Through digital platforms, fast food chains can learn more about consumer tastes and offer personalized promotions.
Fast food chains use stunts to get customers to pay attention, and vie for their business. Fast food eaters aren’t particularly loyal to one brand over another, BTIG analyst Peter Saleh told CNN Business this summer.