Usage share of operating systems Usage share of operating systems The usage share of operating systems is the percentage of computing devices that run each operating system at any particular time. All such figures are necessarily estimates because data about operating system share is difficult to obtain; there are few reliable primary sources—and no agreed methodologies for its collection. In the personal computing platform area of smartphones and watches two systems dominate: Google's Android with over 2.7 billion users and Apple's iOS and macOS combined with over 1.3 billion users. In the area of desktop and laptop computers, Microsoft Windows is generally above 75% in
Usage share of operating systems and use both. Conversely, sales underestimate usage by not counting unauthorized copies. For example, in 2009, approximately 80% of software sold in China were due to copyright infringement. In 2007, the statistics from an automated update of IE7 for registered Windows computers differed with the observed web browser share, leading one writer to estimate that 25–35% of all Windows XP installations were illegal. The usage share of Microsoft's latest client operating system Windows 10 has been slowly increasing since July/August 2016 (while Windows 7 has had a slight decrease at the same time), reaching around 27.15% in December 2016. Windows