RunCharts - track your running

The RunCharts application reads the recorded running activities from HealthKit that you’ve done with your iPhone or Apple Watch and with the detailed charts and information you gain the insight needed to improve your training.

This application fills the void I felt when I stopped using my Garmin products and instead started using my Apple Watch for tracking my running. Specifically I wanted to see a graph of speed vs pulse over the course of the workout. That in combination with average pulse is what I use to determine the quality of the workout.