A wearable biometric sensing ring apparatus for continuous heart rate and blood pressure monitoring having a ring housing for retention on a finger of a user, an electrodermal activity (EDA) sensor disposed within the housing so as to contact a location of the skin of the finger when the housing is retained on the finger, the EDA sensor configured for measuring changes in skin impedance indicative of SNS activation； a biometric sensor disposed within the housing in proximity to the EDA sensor so as to contact at or near the location of the skin of the finger. Application software is provided for assessing the physiological state of the user based on acquired EDA sensor data and biometric sensor data.
