Using an optic sensor on the Samsung Galaxy S9 or S9+ this three week study obtains blood pressure and other physiologic parameters along with daily experiences of stress, emotions, health behaviors (sleeping, exercising), and other factors related to well-being. Participants also complete surveys regarding general health, early adversity, social networks, and personality/individual differences. This study has the potential to provide the largest dataset ever collected on blood pressure responses and stress and emotion experiences in daily life. To read more go to https://mybplab.com/. This study is being led by Dr. Wendy Berry Mendes at UCSF.