Beginning today, any Fitbit device with an optical heart-rate sensor can link with the Cardiogram app on their iPhone or Android phone. Like Fitbit's smartphone app, Cardiogram uses the data collected by your fitness band to paint a visual picture of your health, including emotions and sleep. There are some new smartwatches available in which this types of applications are already installed if you want to know about this smartwatches you can go through by this website https://wearos.shop/
