Fitbit, the popular wearable fitness line owned by Google, announced Tuesday that its personal AI health coach feature, Coach, will add more features for free subscribers. Google's Gemini AI powers Coach, which first launched in October for Fitbit's US Android Premium subscribers, who pay $10 per month or $80 per year for the service. 

Since then, Google has continued to expand Coach access to subscribers across various countries and has added iOS users. Most recently, Google introduced additional features, such as a sleep coach, a health advisor that connects to your medical records and a fitness trainer.

Now, all subscribers can explore Coach's features. Users without a Premium membership can join the product's Public Preview to track their health, fitness, sleep and more. 

"We're always looking to bring experiences to more and more of our users, and we're happy to be bringing some of the redesigned app experiences in Public Preview to users without a Premium membership, so even more people can try them out and share feedback with us," a spokesperson at Google tells CNET.

The newest additions include:

Cycle Health: Lets you log your periods and related symptoms from the calendar. Premium members will have access to personalized insights on their menstrual cycles.

Mental Wellbeing: You can log your moods and mindfulness sessions, and receive a stress management score called resilience, which shows how your body responds to stress. 

Nutrition and Water Logging: You can track your calories and water intake, log your meals, and receive personalized nutrition recommendations based on macronutrient ranges. 

Users can also test future Fitbit app features that aren't live yet and provide feedback to Google. Premium subscribers will be able to fully unlock Coach's features, including personalized fitness plans and ask Coach questions.