Women are a (very) slight majority in Facebook MAUs overall (which is probably within the margin of error). But they're a little more likely than men to buy iPhones, particularly in the USA, and much more likely to buy the iPhone 5C.

What's going on here? There are a couple of dynamics:

All iPhones are more expensive relative to the competition in the UK than they are in the USA, where the pricing structure tends to mask the price of phones.

The iPhone 5S is sold a little more on technology than the 5C and is also more expensive (again, especially in the UK)

The 5C is offered in a wide range of colours

So, is this gender disparity because women are more practical and buy a cheaper phone? Or because the colours of the 5C are more appealing than they are to men? Or something else?

(All this is presuming, of course, that the Facebook data is reliable, but these gaps should be large enough to rise above sample error).