Azumio has created a number of interesting health apps ranging from heart rate monitoring to sleep tracking to glucose monitoring. Stress Check designates a stress score after measuring your heart rate through the camera of your mobile device. The camera and the light of your mobile phone captures your heart rate using your pointer finger as well as analyzes your heart rate variability (HRV), which is the consistency (or lack thereof) of the intervals between heart beats. The less stressed you are, the higher your HRV and the more scattered and random consecutive heart beats you have.
The application then tracks your stress levels over time, which can differ greatly throughout the day. If you have high stress levels, Azumio has another app, Stress Doctor, which may be able to lower your stress levels.