This task can be performed using Watchletic
The Apple Watch app for serious runners
Best product for this task

Watchletic
lifestyle
The app for when you want to take your running to the next level without having to purchase a Garmin watch. It integrates with many external services (TrainingPeaks, TrainAsONE, etc.), lets you setup and run structured workouts, advanced features like pacing target splits with reference routes for hills, scheduling workouts, outside target range alerts, etc. Perfect for planning your next marathon race, and the training to get there. All in a simple to understand UI, no more complex setup!

What to expect from an ideal product
- Here's a bullet list of 5 items about how Watchletic solves the article's howto question:
- Combines data from multiple training platforms in one place
- Offers advanced running analysis without needing a Garmin watch
- Provides structured workouts and pacing targets for hill training
- Helps plan marathon races and training schedules
- Simplifies complex running data with an easy-to-use interface