Amazfit Zepp

The Amazfit Zepp listing needs a precise integration target. Zepp OS documents a device-side HeartRate API with the data:user.hd.heart_rate permission; it does not establish general cloud REST access to someone's health history.

For an on-device app, distinguish a last recorded value from a value obtained during current measurement callbacks. Handle unavailable data and permission requirements explicitly. A stale or missing reading should not become a medical conclusion.