I found that when an app did sell girl characters, it charged on average $7.53, which is a lot in the world of apps. After all, each of the apps I downloaded only cost an average of $0.26. In other words, girl characters cost about 29 times more than the cost of the apps themselves. Disney’s “Temple Run Oz” charges $29.97 to become the only girl character. Sometimes there are small differences in being a boy or a girl — at one point in one of the Temple games, a boy receives a shield, whereas a girl gets a burst of speed — but nothing to warrant a huge price tag. And some of the girl characters, like the $9.99 “Emotika Diva” offered by the game “Super Running Fred,” are not appealing. —The Washington Post.