Following Google's Thursday announcement that it's rebranding the Fitbit app as Google Health, it has also upgraded its Google Health Coach. Previously called the Personal Health Coach, Fitbit's AI-powered coach was available only in public preview for early testing and feedback and had started offering more of its health features to free subscribers. Google Health Coach will remain available to former US Android and iOS Fitbit Premium subscribers, and they'll pay the original price of $10 per month or $80 ...