There is precedent for this: in 2019, Flo, a popular period and fertility-tracking app, was embroiled in scandal after allegations surfaced that it shared sensitive user data with third parties, including Facebook and Google, without proper user consent. Despite its promises to protect user privacy, the Federal Trade Commission (FTC) found that Flo was transmitting intimate health details, such as pregnancy statuses and menstruation cycles, to analytics and marketing firms. In the aftermath of the overturning of Roe v Wade in the US, the controversy led to many American women deleting period tracking apps, amid anxiety that their data could be used against them in future criminal cases in states where abortion has been criminalised.