Monitoring your health has never been easier thanks to wrist and finger wear fitness trackers. But the analysis of the collected data is largely left to the user. Until recent years, that is, when some of the tech companies that make these hats invented their own AI health coaches.
In October 2025, Google released its first version called Trainer, powered by Gemini AI, for US Fitbit Premium subscribers on Android. However, the October launch was a preview, with the company soliciting feedback from early adopters. This February, Google expanded Coach’s public preview including iOS users and Fitbit Premium members in Canada, UK, Australia, New Zealand and Singapore. Google announced Tuesday at its annual health event The Check Up that it is adding more features to its fitness coach, sleep coach and health advisor.
A Google representative did not immediately respond to a request for comment.
Advanced sleep concepts and goals
For sleep tracking, the company’s most important update yet brings a 15% increase in sleep phase accuracy, based on a comparison between its latest and previous algorithms across all compatible Pixel and Fitbit devices.
The current model will now be better able to distinguish between trying to sleep and actually sleeping. It can detect when you are sleeping, when your sleep is disturbed or when you are changing between sleep stages.
In a few weeks, these enhancements will all contribute to an improved sleep outcome that will not only focus on how much you sleep, but also how long it took you to fall asleep. Because it has more sleep data to work with, Coach will be able to provide more informed information and recommendations for better sleep.
Updates to the upcoming Fitbit health coach include sleep, medical records and continuous glucose monitoring data.
Access to medical records
In April, US subscribers will be able to link their medical records, such as medications, lab results and doctor visit history, to the Fitbit app.
This feature was created in collaboration with B. Well Connected Health, an AI-powered digital health platform that integrates health data from various providers, and Sula, an identity verification platform known for airport security.
In the Fitbit app, you can search for your doctor and connect to their member portal. Or if you use Clear to verify your identity with a selfie and valid ID, it will search medical records for you. Availability will depend on your provider.
Once you’ve verified your identity, a Fitbit health coach can access your medical records.
The Fitbit Trainer can then use your medical history to create a more personalized guide that includes your lab results, data collected by your Fitbit and any other important information it collects from your records. In a few months, users will be able to share these records and summaries with their provider or family members using a QR code or Smart Health Link URL.
What it will look like when you can share your Fitbit health summary with a doctor or relative.
Privacy is always a concern
Privacy experts warn people to think twice before uploading medical information to an AI tool.
Fitbit says it securely stores your medical records and that you control how your data is used, whether it’s shared and whether it’s deleted. The company also says that your medical records will not be used for advertisements.
AI health coaches are not a substitute for a doctor, as they cannot diagnose or treat medical conditions. You should not make any changes to your lifestyle or health routine without consulting your doctor.
The future of Fitbit’s health coach
Google also announced that it is investing in health research on topics such as predicting insulin resistance using data collected by wearables, high blood pressure and learning more about how AI works in virtual care settings. These articles help us get an idea of what Google might have in store for future Fitbit updates.
In April, Fitbit members in public preview will also be able to connect the continuous glucose monitor to the Fitbit app through Health Connect. This feature allows you to see all your health data from compatible apps in one place. Through this connection, Fitbit members can ask their Trainer for more information about how exercise or food choices affect glucose levels.
