Wednesday is National Cheeseburger Day: Here are the deals to relish [Video]

New York (CNN) — Wednesday is National Cheeseburger Day, with some of the biggest chains offering some much-needed discounts amid consumer complaints about rising prices.

McDonald’s, the biggest company, is selling 50-cent double cheeseburgers when they’re ordered in its app – about 45 cents more than what the chain’s original hamburger cost in 1948. It’s part of company’s string of deals to kickstart slumping sales, including recently extending its popular $5 value meal until December.

Fast food has been a low-profit margin business with little customer loyalty. Chains have been unveiling big giveaways, typically tied to their mobile apps, to help drive business and develop more repeat customers.

And McDonald’s isn’t the only burger chain to offer deals. Wendy’s is selling a junior bacon cheeseburger for just one cent through September 22, as long as you buy something elsefrom the menu on its app. Also, Burger King is giving away a free cheeseburger as …