Why do I need to give my birthday/weight/height information? Your age, weight, and height inform our activity algorithms (steps, calories, etc.) and makes them more accurate. Related articles How do I get a manual for my watch? How long does it take to charge my battery? Which phones are compatible with my CZ Smart Gen 2 Hybrid smartwatch? Why do I need to give my birthday/weight/height information? What is the warranty on my Smartwatch?
