Who needs a mobile wallet solution when you can just build your own app? That philosophy seems to be picking up steam among fast food chains. Domino's, Pizza Hut, Chipotle, and other restaurants have built their own iOS apps that let customers place orders on the go. Of course, there's also coffee giant Starbucks to consider; the company's mobile app has proven enormously popular with hurried customers. Now fried chicken purveyor KFC is joining the fray. It's starting small, with the just-launched Fast Track app accepting orders at ten trial locations in the UK.

But if the formula proves successful — and anything that lets people skip waiting on a line usually does — KFC says it's willing to bring Fast Track to the US. After putting together an order and paying in advance by credit card, customers can simply walk into a participating KFC and pick up their food. There's not much else to it, though the app (developed with help from mobile payments specialist Airtag) has a clean design and is optimized for the iPhone 5 with retina graphics all around. Regrettably, the Double Down is no longer on the menu.