Passive Heart-Rate Monitoring During Smartphone Use in Everyday Life

Summary

Demonstrates that heart rate can be passively monitored from a smartphone's front-facing camera during normal everyday use — without any wearable device. The AI model extracts remote photoplethysmography (rPPG) signals from facial reflectance during incidental phone-camera exposure (selfie camera during scrolling, video calls, etc.), achieving clinically meaningful HR accuracy validated in a large-scale real-world deployment. Published in Nature (2026, vol.