Exercise
The Can5k app has the ability to track your runs and has been designed to keep you motivated to reach your fitness goals.
Personality
Create a personal profile and set a personal daily exercise goal.
Calendar Access
View a calendar with anticipated weather for your run. Monitor daily exercise goals set either by a coach or by yourself.
Group
Talk with other users of the app through the built in messaging service.
Disclaimer:
This app utilizes continued use of GPS running in the background and can dramatically decrease battery life if used for a prolonged time.