StressScan, an app for stress assessment with 3 million downloads, is being transformed into Habitone (https://play.google.com/store/apps/details?id=com.buri.user.android)! Just place a finger over the camera for two minutes, and StressScan will analyze changes in your heart rate interval and scientifically measure the level of your mental and physical stress on a scale of 1 to 100. - What is the principle behind StressScan? − Many of the functions essential to maintaining human health are c