The Google Fitbit Air, a budget-friendly fitness band priced at $99.99, is getting new health-monitoring features originally introduced with the more expensive Google Pixel Watch 5. These features, called Health Guardian tools, include Insulin Resistance Trends, Blood Pressure Trends, and Sleep Breathing Quality. They are now available in the Google Health app for free, without requiring a paid subscription. This update adds more health insights to the Fitbit Air, which already offers basic fitness tracking in its free version and an advanced AI fitness coach through a premium subscription. The Fitbit Air's free tier has some limitations, and the premium features depend on how comfortable users are with interacting with AI chatbots. However, both versions are improving with the new Health Guardian tools. These tools were first introduced on the Google Pixel Watch 5 earlier this year. While the Pixel Watch includes four similar features, the Fitbit Air lacks some of the necessary hardware, like a screen, to support all of them. For example, the Breathing Emergency Detection feature on the Pixel Watch requires a built-in emergency contact system that the Fitbit Air does not have. Each Health Guardian tool works differently. Insulin Resistance Trends analyze data collected over several weeks to help track changes in metabolic health. Blood Pressure Trends use passive measurements of pulse and motion patterns throughout the month to estimate blood pressure without needing a cuff or manual calibration. Sleep Breathing Quality tracks how much time was spent in "optimal breathing" during the previous night and gives users advice based on sleep scores and other health data. The Google Health Coach can use these metrics to offer personalized recommendations, such as creating a meal plan by combining Insulin Resistance Trends with nutrition logs. While the AI coach may not be everyone's favorite feature, the Fitbit Air as a whole is well-regarded for its affordability and functionality. Competing wearables like Whoop and Garmin Cirqa offer some similar features, such as blood oxygen monitoring, but lack the new Health Guardian tools. For many users, the low price of the Fitbit Air, combined with these new features, could make it a more attractive option than pricier alternatives.