https://www.theverge.com/2018/7/26/17618834/apple-smartwatches-3-5-million-q2-2018

Apple shipped 3.5 million smartwatches in the second quarter this year, an uptick of 30 percent year over year, according to a Canalys report today. Last year the second quarter was Apple’s worst of the year, so the numbers this year suggest the Apple Watch Series 3 is considerably more popular than its predecessor.

Still, rivals like Fitbit and Garmin also made a strong showing in Q2 and they actually widened their share of the market. Features like advanced heart rate metrics and smart coaching helped those rivals set their devices apart from the Apple Watch. So although Apple shipped out more watches, its overall market share dipped to 34 percent compared to 43 in Q1.