Health apps may not disclose sharing your personal information

While nine out of 10 phone apps for depression and smoking cessation assessed in a recent study were found to be sharing user data with third parties, only two out of three disclosed they were doing so.

Much of that data, including linkable identifiers, was shared with Google and Facebook, among others, but barely half of apps sharing data with those two giant companies told users about it, researchers report in JAMA Network Open.