Blink Detection Blink uses your webcam to detect blinks and only reminds you when you aren’t blinking enough. No more annoying notifications or distracting alerts. Backed by Science Research shows that we blink less frequently when staring at computer screens, which leads to eye stress and dryness. Blink gently reminds you when you are blinking less than the recommended 15-20 times per minute. Privacy Blink uses on-device machine learning to detect blinks. It never stores or uploads your camera data. External Camera Support Easily toggle between your built-in FaceTime camera and your favorite external camera. *Blink is not a medical app and does not offer medical diagnosis, treatment, or advice.