Monitoring your health has never been easier thanks to wrist- and finger-worn fitness trackers. But analyzing the collected data has largely been left to the user. Until recent years, that is, when some of the tech companies that make these wearables launched their own AI health coaches.  In October 2025, Google debuted its version called Coach, powered by Gemini AI, for US Fitbit Premium subscribers on Android. However, the October launch was just a preview, with the company requesting feedback from early adopters. This February, Google expanded the public Coach preview to include iOS users and Fitbit Premium members in Canada, the UK, Australia, New Zealand and Singapore. Google announced Tuesday at its annual The Check Up health event that it’s adding additional features to its all-in-one fitness trainer, sleep coach and health advisor.  Improved sleep insights and scoring For sleep tracking, the company’s most significant update yet delivers a 15% increase in sleep stage accuracy, based on comparisons between its latest and previous algorithms across compatible Pixel and Fitbit devices. The current model will now …