The tech company has lost a massive privacy case involving the Flo app that has raised huge questions about how health apps are secretly being used.

Meta lost a major privacy trial on Friday, with a jury in San Francisco ruling that the Menlo Park giant had eavesdropped on the users of the popular period-tracking app Flo. The plaintiff's lawyers who sued Meta are calling this a "landmark" victory - the tech company contends that the jury got it all wrong.

A federal jury found on Friday that Meta violated the California Invasion of Privacy Act, the state's wiretap law, by collecting data from a period-tracker app without user consent. Plaintiffs in a class-action case proved by a preponderance of evidence that Meta intentionally eavesdropped on and/or recorded conversations using an electronic device,