Deliveries 9.2 or later includes a new version of our Apple Watch app, which should fix most syncing problems. We recommend enabling iCloud sync in the iPhone app, which will allow the Apple Watch app to update even if it can’t communicate directly with your iPhone.
Often restarting your Apple Watch will fix issues where it’s unable to communicate with your iPhone.
If you continue to have problems, it may help to delete and reinstall the Apple Watch app by following these instructions:
Once the initial sync is successful, the app should sync automatically in the background.