Good point, Nyllet, fortunately I do have an automated blood pressure device at home, but this is a weak part of the design. If you do not have access to a place where they can measure BP easily it is not easy to get the watch calibrated. Wonder if Samsung will come up with new developments which takes away the necessity to do regular calibrations
@Nyllet: I'm not sure if this will change in the future however, currently, a cuff-based blood pressure monitor is required in order to calibrate the Galaxy Watch 3 to measure your blood pressure. For more information, please check out the link below.