Android: 80% Market Share = 52% Installed Base

via John Gruber. Charles Arthur, The Guardian:

Now we get to the key point. Because it’s easy to measure market share – much easier than measuring installed base, which requires large panels of people who you interview on a regular, repeated basis. (ComScore does this in the US, where it provides a picture of the installed base of smartphone users that is consistent back to the end of 2009. Its figures for the three months to September 2013 show a 51.8% installed base for Android – that’s 76.6m – and 40.6% for iPhone – that’s 60m. It’s not 80% Android; not even close.)