could make you run faster than being chased by brain-starved zombies? As you sprint away from the imaginary threat, this GPS-enabled app will track your progress and instruct you accordingly. Speeding up won't only help you get in shape, it will also put more distance between you and the sound of scuffing feet. Race Finder ($0.99) This app is perfect for those who have moved beyond beating their personal bests. Whether you're looking for a 5K race, 10K race or a full-blown marathon, this app will find it for you. Open it, and its GPS technology will locate any race happening in your area. So, what are you waiting for?