More specifically, Android saw usage market share of 37.93 percent in March, while Windows accounted for 37.91 percent. This is the the first time Android has passed Windows, though these numbers will naturally fluctuate. iOS followed with 13.09 percent, OS X took 5.17 percent, and Linux accounted for 0.75 percent.
StatCounter measures usage market share by examining aggregate data of about 15 billion pageviews per month across its network of over 3 million websites. The results thus tell a story of what platforms are used the most, as opposed to which ones have the most users (for user market share, you’ll want to look at data from Net Applications). Put another way, StatCounter is saying Android is used more than Windows, when looking at total pages visited, but it may or may not have more users — one person naturally visits more than one page.