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Here's something to brighten your winter blues! Shake Shack is launching its first-ever mobile app, and to celebrate, it's giving away free ShackBurgers to each guest who downloads the app. It's redeemable at any U.S. location (except airports, stadiums & ballparks) until Tuesday February 28, 2017.
To get a free ShackBurger, guests simply need to download the Shack App, create an account and use the promo code “shackappy” at checkout.