https://www.cnbc.com/2019/01/14/apples-services-revenue-growth-is-slowing-down-rbc-says.html

Apple's services revenue, which the company has touted as a burgeoning source of growth, may actually be slowing down, according to RBC Capital Markets. In a note published Sunday, analysts wrote that Apple's services revenue has slowed to 18 percent year over year growth in the December quarter, compared to estimates of about 27 percent.

While RBC laid out a number of reasons for the slowdown, the analysts wrote that assuming there is not a structural issue at play.