To take advantage of the offer, simply order any menu item through the Sonic App or online and you’ll qualify for a free Cheeseburger on the house.

The Sonic Cheeseburger features a beef patty, cheese slice, chopped onions, lettuce, pickles, tomato, ketchup and mayo, on a plain bun.

Just be aware that the free Cheeseburger reward can only be used once during the promo period, while supplies last.

Image via Sonic

…