Running is called king of exercises for a couple of reasons , physical benefits of running are well known and enough has been said about it but it also provide power to the area of brain which is responsible for competitive urge that people feel , Running is a great way to reboot ones brain. Runkeeper lets you keep track of how much distance you have covered in how much time , it also tells you about the speed in which you have covered the area ,Hence giving you a professional edge to customize your running habits and gets the most out it.
Note: "Continued use of GPS running in the background can dramatically decrease battery life."