>>11441pinterest has the greatest absolute and relative difference in favor of female users.
second place depends on how you measure. women have 17 percentage points over men in terms of how many of us use facebook. but, going by relative proportion of user base, bereal comes in second after pinterest with about 2.5x as many female as male users. (surveying men and women about how many of them use x site is much better than going off of accounts which are overwhelmingly bots)