GoKawiilFitbit Air and Edge add insulin resistance and blood pressure trend tracking
Google has added new insulin resistance and blood pressure trend features to the Fitbit Air and Fitbit Edge, part of its 'Health Guardian' suite of health tools. The features, which analyze heart rate, activity, sleep and other metrics rather than measuring blood directly, are exclusive to subscribers of the $100-a-year Google Health Premium plan who have worn their device for at least five days.