For some reason my Galaxy Watch 4 has started giving high blood readings, quite a bit higher than my blood pressure machine. Was working fine not much between readings so don't know why this is? Tried recalibration but no change?
OK... so I noticed there was an update for the watch so I installed it and rebooted watch, did blood pressure reading and all back to normal? Reading not much different to my machine & close enough to use as guide.