Is it possible to develop the following app? The app will measure heart rate variability five times at 2-minute intervals triggered by an event and output the values.
This topic was discussed in the following post:
Basically, there is no guarantee that the system samples heart rate as frequent as five times per two minutes, and with today's HealthKit, there is no API for a 3rd party app to impact the sampling rate (on an Apple Watch).
Best,
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Ziqiao Chen
Worldwide Developer Relations.