Google announced on Tuesday that the public preview of Fitbit’s AI personal health coach is rolling out to iOS users in the U.S. as well as both iOS and Android users in the UK, Canada, Australia, New Zealand, and Singapore. It initially launched in October, when it was only available in the U.S. on Android devices.

To try out the feature, users need to have an active Fitbit Premium subscription and use a Google account to sign into the Fitbit app. They also need to use one of the 14 currently-supported devices, which include Fitbit’s wearables, as well as the Pixel Watch. According to Fitbit, the AI health coach will be rolling out “over the next few days,” so it may not be available to all eligible users immediately.

The update is a major overhaul of Fitbit’s app, introducing the ability to chat with a Gemini-powered AI that creates custom routines and workouts based on users’ personal health goals, workout equipment, and training preferences.