But the most interesting new feature of the tags is the newly added report that appears the moment you tag your day (e.g., wine, i.e., that you — in the evening — drank wine, or cold, when you felt cold symptoms, etc.). Press enter or click to view image in full size Oura users who drank wine had a 2% increase in nighttime heart rate (about one beat per minute; an average heart rate generally means a recovery impairment). The concept is simple: you are challenged by the Oura app (e.g., not to drink caffeine before bedtime), you record your failure/completion over some time… and voila, Oura measures everything, compares and explains the impacts on your biometrics.