LightPulse: Heart Rate Monitor

Cover the back camera with your fingertip. In about fifteen seconds, LightPulse gives you a heart rate in BPM. No wearable, no chest strap, no account. WHAT A MEASUREMENT TELLS YOU Each measurement is shown against the typical range for someone your age. If the signal is unsteady, LightPulse says so and asks you to try again. It will not show you a number it isn't sure of. CONTEXT, IF YOU WANT IT Add a tag to a measurement: Resting, After sleep, Exercising, After coffee, Stressed, Poor sleep. The tag stays with that measurement in your log. Tagging is optional. Untagged measurements still count. VARIABILITY AND STRESS, WITH PLUS Switch to the sixty-second Detailed measurement and LightPulse reads two more figures. Heart rate variability, or HRV, is how much the gap between your heartbeats changes. Stress is a standard index of how tightly those gaps cluster — tighter clustering, higher…