Analysis of 4000 users of Israel’s Hello Heart iPhone, Apple Watch and Android phone app reveals that, after six weeks use, 25% had reduced their blood pressure by 10 points or more, with an average drop of 24 points.

https://www.youtube.com/watch?v=iLqtH1yMEG0

http://www.foxbusiness.com/technology/2015/10/12/can-app-help-prevent-heart-attacks/

https://helloheartapp.com/change-behavior-and-lower-blood-pressure/