Historical heart rate data using the SDK

[HeartOne]

I understand that historical heart rate data can be accessed using the Web API.  Is there also a way to access historical heart rate data via the SDK, which has direct communication with the device?  I am not referring to heart rate event callbacks from the sensor, which obviously does not provide historical data.  If there is no SDK/API call for this sort of thing, perhaps I can read from a local file that contains the data?

[Gondwana · Accepted solution]

Short answer: no. The closest approximation is to use the heart rate callback to collect data and save it yourself in a file. This means that your app has to be running continuously.

This clockface does that (as well as other activity measures) for the current day.