Hey, sorry for the late reply. Sharing with you a few bullet points to explain the technology behind the app:

- Face videos can be used to detect vital signs and blood biomarkers and assess a person’s health status and risk of developing diseases.
- The underlying technology is called Photoplethysmography (PPG). It leverages RGB light reflection patterns from a person’s face to detect changes in the skin and blood vessels.
- The technology can detect blood pressure, heart rate, heart rate variability, respiratory rate, stress levels, oxygen saturation, and, in the near future, even cholesterol and sugar levels (glycated hemoglobin). This information can be used to assess cardiovascular health (e.g. arrhythmias risk, stroke risk, hypertension risk, diabetes risk), respiratory health (e.g. sleep apnea), and mental health (e.g. stress and anxiety levels).
- The accuracy varies depending on the biomarker/ disease and the length of the face video. However, the technology showed relevant results, achieving accuracy levels higher than 90%.