Apple Watch shipments were up 54 percent compared to last year, with the company shipping an estimated 4.2 million units during Q32018, according to a the latest data shared by IDC. Despite the increase, Apple still remains in second place to Xiaomi for wearables, with the latter company having shipped 6.9 million wearable devices during the same quarter, although Apple still came in at a respectable 13.1 percent market share as compared to Xiaomi’s 21.5 percent, and ahead of third-place contender Fitbit, which shipped 3.5 million wearable devices. As the vendors and categories suggest, IDC uses a broad definition of “wearable devcies” that range from fitness trackers through to full smart watches like the Apple Watch. As MacRumors notes, IDC is left to estimate Apple Watch shipments since Apple does not provide specifics on unit sales, and blends Apple Watch revenue into its “Other” category along with a plethora of products such as AirPods, Apple TV, HomePod, and Apple-made accessories. However, IDC states that the Apple Watch Series 4 only accounted for less than 20 percent of all Apple Watch shipments, with the rest being made up of the 2017 Apple Watch Series 3, which saw sales boosted as a result of its price reduction after the Series 4 debuted this fall.