yellingdog·11 เดือนที่ผ่านมา·discussI would expect an extremely infrequent heart rate sample rate at idle. I believe the current-gen watches only sample every 10 minutes unless activity is detected.
yellingdog·3 ปีที่แล้ว·discussThey do, it's free, and their developer website is shockingly nice. https://developer.usps.com/api/18