(NBC) - The restaurant chain Shake Shack is introducing its new "Shack App" and users can get a free burger.
The mobile ordering app allows customers to place an order, then select a location and time for pickup at select Shake Shacks.
Users who download the app by Feb. 28 receive a free single Shackburger. Just create an account and use the code "shackappy" at checkout.
Courtesy: NBC News Channel
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