“Let’s get app-y! Shake Shack® is proud to announce the first-ever mobile ordering Shack App for iOS is now available nationwide. To celebrate the occasion, Shake Shack is giving away a free single ShackBurger® to each guest who downloads the new Shack App, redeemable at any U.S. Shack (‘cept airports, stadiums and ballparks) until Tuesday, February 28th, 2017.”
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