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 testing the service in Manhattan for the past few months, but it's now available in multiple locations across the US. Sadly, it's not a full nationwide rollout -- the company left out some locations, including Austin, Dallas and Atlanta. Plus, only the iOS app is available for now, though according to Eater, Shake Shack is also developing an Android application.