Earkick is one of hundreds of free apps that are being pitched to address a crisis in mental health among teens and young adults. Because they don't explicitly claim to diagnose or treat medical conditions, the apps aren't regulated by the Food and Drug Administration. The industry argument is simple: Chatbots are free, available 24/7, and don't come with the stigma that keeps some people away from therapy. But there's limited data that they actually improve mental health.