-StarRunners will help you keep track of your running and track your improvement. A map of each run, your splits, and elevation change will be recorded. StarRunners also allows playback of your music and can provide automated words of encouragement during your run.
-iOS 8 Health Integration. This is optional and can pull information from your Health app to perform calculations on how many calories you have burned. This is for your information and is not recorded back into your Health app.
-Continued use of GPS running in the background can dramatically decrease battery life.