Global smartwatch shipments in Q4 2016 increased 2% YoY and 67% QoQ. Apple's watchOS and Samsung’s TIzen operating systems took the top spots in the critical Q4 shopping period, pulling further away from a chasing pack lead by Android Wear vendors which captured only 13% of the market. Our report tracks global smartwatch shipments and share for leading vendors by quarter from 2013 to Q4 2016. It can be used by device makers, component suppliers, operators, developers, content suppliers and other stakeholders to determine the size and growth rate of the global market.