Free apps marketed to people with depression or who want to quit smoking are hemorrhaging user data to third parties like Facebook and Google — but often don’t admit it in their privacy policies, new research says. The study is the latest to highlight the potential risks of entrusting sensitive health information to our phones.

Free apps marketed to people with depression or who want to quit smoking are hemorrhaging user data to third parties like Facebook and Google — but often don’t admit it in their privacy policies, new research says. The study is the latest to highlight the potential risks of entrusting sensitive health information to our phones.