Stryd has various apps that work on the Garmin watch. Some Stryders are still looking for additional data fields, more flexibility or training plans on the watch.
Stryders interested in having more power data fields (such as average, instant, lap average, etc) should look into PowerDashBoard and DataRun. These are great apps, although they do not store the power data in the FIT file and the runs will not upload to PowerCenter. You can upload the Stryd data directly from the device using the Stryd app on your phone (Offline Sync) and get all the data that way into PowerCenter.
PowerCenter training plans can currently not be loaded onto the Garmin watches. For folks interested in having power based training plans on the watch, should look into TrainingPeaks.
If you need additional assistance, contact firstname.lastname@example.org.