Fast-food chains like Burger King, Shake Shack, and KFC are doubling down on digital order kiosks — but watch out, you'll probably end up spending more

• Fast-food giants are rapidly deploying more order kiosks in the US.
• They save on labor costs, are more accurate, and push customers to spend more.
• Kiosks are "a win on every single front," RBI executive chairman Patrick Doyle said.

Major US fast-food chains plan to aggressively add more digital order kiosks to their restaurants – and bring in bigger checks in the process.