GO TO MCDONALD’S TO GET A WHOPPER FOR A PENNY

Burger King is selling its iconic burger for a penny at McDonald’s in a promotion called the “Whopper Detour.” It “works by geofencing McDonald’s locations,” Burger King said. “If a guest is inside one of these geofenced areas and has the new BK App on their device, the app will unlock the WHOPPER sandwich for a penny promotion.” After the order is placed, the user will be “detoured” from McDonald’s, and the app will navigate them to the nearest Burger King to pick up the burger. It runs through Dec. 12.

GENE J. PUSKAR/AP