With Rhythm Core, you gain a deeper understanding of your body's rhythm, with data such as heart rate and activity tracked throughout the day, while other data, including sleep cycles and sleep recovery, is tracked during the night. This data is then transferred to our app, which gives you recommendations with our AI coach and data right at your fingertips. With the family bundle, you can get Rhythm for you and two others to further understand your rhythm together with 6 months of our app.