Apple can now bring a blood pressure alert to some of its watches. The FDA gave the green light recently, and Apple first showed it off at its September 9 event alongside the slimmer iPhone AirWhich Watches Get ItNot every watch is included. After that, if it spots consistent signs of high blood pressure, it sends a notification. Why It MattersHigh blood pressure often shows no symptoms. The update will likely come through the Apple Watch app or via iOS updates .