The app’s practical functionality and the dark humor its name evokes have struck a chord with young people in China, who swarmed to download it over the past week. At the time of publication, Are You Dead Yet was the number one paid app in the Chinese version of Apple’s App Store. It is also climbing the rankings in overseas app store charts, even though Guo says he hasn’t spent a dime on paid advertising. “We don’t have that kind of money,” he says.