The first thing I want on any of my smart watches is the ability to quickly make a call. What better way than old-school speed dialing.
The app on the Garmin Connect IQ Store: https://apps.garmin.com/en-US/apps/ebb8b616-52cb-4a32-aee3-aaa95eeffb8d
An Android companion app is required: https://play.google.com/store/apps/details?id=eir.garmin.speeddial