Do I need to press a button or take action to start tracking my sleep? No, your CZ Smart Gen 2 Hybrid smartwatch will automatically track your sleep so you don't need to take action to enter or exit sleep mode. Related articles Can I send my sleep data to other apps? Why is my sleep data not being tracked? Can my smartwatch track my sleep? What is the CZ Smart YouQ Wellness application? How can I view my sleep history?