HeartMath

 First established in 1991, HeartMath's products include a series of wearable sensors and a software package aimed at measuring heart rate variability and giving users insight into their emotional and physical wellbeing. Using a series of directed breathing exercises and positive emotional visualizations HeartMath empowers users to self monitor and regulate stress. The company says it systems are in place at a number of healthcare institutions nationwide including Gundersen Health System in Wisconsin, IU Health Bloomington Hospital in Indiana, and Fairfield Medical Center in Ohio.