Grabbing lunch from Shake Shack simply means waiting for the better burger’s chain’s famously long lines. Fortunately, that could change with the nationwide release of Shake Shack’s new mobile ordering app on Monday. Plus, the chain is also giving away free cheeseburgers to celebrate.

Starting on Monday January 23rd, the chain will be handing out a a free single ShackBurger if you download its newly launched mobile ordering app, aptly named the Shack App. Just create an account, and use the promotional code “shackappy” at checkout for your mobile order. The free burger code is redeemable at Shake Shack restaurants nationwide through February 28th. Of course, you can only use the promo code once.

According to Shake Shack, ordering via the new Shack App will definitely result in shorter pick up times. It allows you to select what you want from the menu and choose a pickup time at your local Shake Shack location. Your food will be cooked, ready, and timed to your arrival, which first tested the app at select locations last October.

The free cheeseburgers sound so good though.