Frozen apps are so numerous that you can pretty much divide them up into subgenres. There’s the fashion makeover genre, the coloring app genre, the tile shuffling genre, the Flappy Bird clone genre.

Wearing a costume from “Frozen” in daily life has become a pastime for many children who identify with the character, regardless of gender. By Abigail Covington Dressing up as Elsa, the blond queen ...