McDonald's celebrates National Cheeseburger Day with a special offer: a double cheeseburger for just 50 cents, only 45 cents more than the original 1948 hamburger price.

This deal is exclusively available to McDonald's app users and is limited to one burger per person.

On regular days, McDonald's cheeseburgers typically range in price from $1 to $2.79.

The fast-food industry, known for low-profit margins and limited customer loyalty, often relies on mobile app promotions to boost business and retain repeat customers.

Wendy's is participating in National Cheeseburger Day with a one-cent junior bacon cheeseburger promotion until September 22, 

Burger King joins the celebration, offering a free cheeseburger to loyal customers who join their Royal Perks program, with a minimum $1 purchase requirement.

Regional chains like Smashburger, Krystal, and Carl's Jr. are also offering discounted burgers in honor of National Cheeseburger Day.

These promotions on National Cheeseburger Day are a long-standing tradition in the burger industry,

National Cheeseburger Day is an excellent opportunity for burger lovers to enjoy delicious deals at their favorite fast-food establishments.