Shake Shack may have just raised its burger prices but now you can actually score one for free.

On Monday, Shake Shack announced the nationwide launch of its mobile ordering Shack App for iOS. Previously available at select stores, the app allows users to pre-order burgers, dogs, fries and more-- and choose a specific pickup window to cut down on those notorious wait times.

To celebrate the big launch, Shake Shack is giving away one, free single-patty ShackBurger to each customer who downloads the program.

Want a ShackBurger on us? Download the Shack App, create an account & use the code “shackappy” at checkout: https://t.co/g1Y41bS3GU pic.twitter.com/7tAHOlAjUd
— SHAKE SHACK (@shakeshack) January 25, 2017

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In a statement, Shake Shack CEO Randy Garutti praised technology and said the initial testing and rollout phases "have gone very smoothly."

All Shack classics are featured on the app plus customers can keep track of potential food allergens in ingredients, access nutrional information, and check out the latest restaurant promotions.

Ever wondered what it’s like inside the original Shack in New York City’s Madison Square Park? App users can also access the live Shack Cam for a sneak peek.

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The free food is only a one time offer but it seems as though fans of the popular burger are getting creative on how to score more than one.

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Android users will have to be patient as the Android version of the app is still in development.

The burger is redeemable at any U.S. Shake Shack (excluding airports, stadiums and ballparks) until Feb. 28.