Consumers may be holding off on purchasing Apple's smartwatch in anticipation of the next version, according to research firm IDC.
And Netflix is on one of every three connected devices in the US, says IHS.
The company's shipments in the first three months of 2016 fell by 40 percent from the holiday-shopping quarter -- a plunge more than double the drop among the top notebook vendors as a whole.
Global shipments grew more than 200 percent in the first quarter, but Apple's share of the market it helped create has dropped to a little more than half.
CEO Tim Cook said the company faced "macroeconomic headwinds," which is code for having a really hard time convincing people to buy iPhones, iPads and Macs.
Shipments sunk last quarter as consumers continued to gravitate toward other devices. But increased purchases of Windows 10 PCs may provide a bounce toward year's end, say Gartner and IDC.
Vendors shipped 1.43 billion smartphones last year, a record for one year, according to preliminary results from IDC.
With the exception of Apple, worldwide shipments of personal computers continued to tumble in the final months of 2015.
A number of flagship phones vied for attention, but the real growth lies with more modest devices and in emerging markets, says market researcher IDC.
Chinese up-and-comers are taking a big bite out of the global smartphone market, much to the discomfort of market leader Samsung.