Pulselens field notes
Understand the signal behind the number.
Clear explanations of heartbeat timing, recovery and camera measurement—grounded in published research, without turning a wellness reading into a diagnosis.
HRV · Measurement01
How to check HRV without a watch
What a phone camera can measure, what a finger pulse cannot, and how to make each reading comparable.
8 min
Heart rate · Reference02
Resting heart rate by age
Evidence-based ranges for adults and children, plus the reasons your own normal matters more than one number.
7 min
Your signal, not a generic average