The rebranding of Google Health, previously known as the Fitbit app, has received negative feedback from users, prompting Google to address bugs and emphasize user feedback. The app includes customization options, such as using the Health Connect API to share data with other health apps and devices. Users can also set health goals with the AI-powered Health Coach if they subscribe to Google Health Premium, which costs .99 per month. The new Fitbit Air device, priced at .99, tracks health data for up to seven days on a single charge and serves as an entry point into the Google Health ecosystem. Subscriptions to Google Health Premium or Google AI Pro, priced at .99 and .99 per month respectively, enhance the app's functionality but are optional.