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01/22/2017 11:00 PMShake Shack, with locations in New Haven, Westport, and Darien, is celebrating the launch of their new Shack App by offering a free single ShackBurger to anyone who downloads the app, creates an account, and uses the special promo code when they check out. The offer expires on Tuesday, Feb. 28.
Shake Shack is located at 986 Chapel Street in New Haven, 1849 Post Road East in Westport, and 1340 Post Road in Darien. For more information on the promotion, visit www.shakeshack.com/2017/01/23/shake-shack-celebrates-national-launch-shack-app-free-burgers-first-time-users.