One of the best apps for runners, Nike + GPS is a user friendly way to log your workouts and get the most of out of them. The app eliminates the need for a sensor attached to your arm or shoe; instead, the phone records your pace, distance and route using its built-in GPS. The app also gives you voice feedback as you run so you can concentrate on the path ahead and allows you to activate a "PowerSong" of your choosing for an extra motivational push. You can share your run with friends and supporters via Facebook, and Twitter, and revisit runs long after they're over.
Price: $1.99 via iTunes