This app reads from HealthKit, fetches running, cycling and many more workouts and converts them into handy GPX files.
You can also upload GPX files to Strava, open them on your favourite GPX editor or share them.

If iCloud Drive is enabled on your device, GPX files are synced automatically in a folder named "GPX Workout".
You can easily browse them with the Finder app on your Mac or with the Files app on iOS.

This is a one man band project: comments and suggestions are welcome and I'll do my best to answer and give support!