As a concept apple watch in a personal opinion is one of the amazing things arrived in the past year to the market. The new series 4 of apple watch are amazing and their main goal is health with that said sometimes instead of showing me that i'm allive the apple watch sometimes send signals that i'm dead. It mesures the pulse every several seconds and due to fault mesurment sometimes pulse drops under 50bpm and in it's automation it send a message to 911 come and revive me.
