Shake Shack's mobile app now takes orders across the US
 

You might have one more option to choose from if you don't feel like lining up for some fast food. Shake Shack has joined the growing list of food chains with mobile apps that give you a way to order and pay ahead of time. The restaurant has been tes...

https://www.engadget.com/2016/12/20/...ck-mobile-app/