Passive heart-rate monitoring during smartphone use in everyday life

Resting heart rate (RHR) is a key biomarker of cardiovascular health and mortality1,2,3, but passively tracking it longitudinally generally requires a wearable device, limiting its availability. Here we present passive heart-rate monitoring (PHRM), a deep-learning system that uses facial video-based photoplethysmography for passive measurements of heart rate (HR) and RHR during everyday smartphone interactions.