Denny's is giving away free food - here's how to get some

• Customers can get a free Denny's Grand Slam if they create an account on the chain's digital ordering and payment app.
• The deal lasts from Thursday until the end of January.

Denny's has a deal to convince people to order online.

On Thursday, the chain announced that from now until January 31, customers who create an account on "Denny's on Demand" will get a complimentary Build Your Own Grand Slam.

"Denny's on Demand" allows customers to order and pay for their food either online or via app. Ordering is available 24 hours a day, seven days a week.

"We launched 'Denny's on Demand' as a way to serve our guests exactly how - and where - they want to be served, offering greater convenience without compromising on quality or variety," John Dillon, Denny's chief marketing officer, said in a statement.

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