Reading her book was less fun, because the incompetence and injustice she described was so depressing – from the makers of protective vests for police officers who forgot that some officers have breasts, to the coders of a ‘comprehensive’ Apple health app who overlooked that some iPhone users menstruate.5 Her book argues that all too often, the people responsible for the products and policies that shape our lives implicitly view the default customer – or citizen – as male. Women are an afterthought.