A Running app for your watch to make sure you stay on pace.
Its easy to start a run with the settings from your last run.
Its also easy to customize your target pace, run location type, and type of haptic notification.
While you are running you can see if you are running at your target pace. If you do start to go a bit too Fast or maybe a bit Slow your watch will let you know by tapping your wrist and playing a tone(unless you have your watch silenced) until you get back in range.
And when you are done the app will save your workout data including calories burned, distance, and exercise time into the Health app so you get credit in your activity rings!