How often do I need to sync my watch in the App? We recommend syncing at least once weekly to guarantee your device stays fully updated and properly functioning. Regularly syncing in the app also prevents the loss of Activity data. Related articles How do I pair my smartwatch to my phone? How do I know which band size to select when placing my order? How far away can my watch be from my phone and still be connected? Do I have to wear my watch to bed to log a sleep session? Where can I find instructions for adjusting the band?