https://www.theguardian.com/world/2022/jun/28/why-us-woman-are-deleting-their-period-tracking-apps

Even before the supreme court decision to overturn Roe v Wade, the trend to ditch the apps began amid fears of prosecution

Many American women in recent days have deleted period tracking apps from their cellphones, amid fears the data collected by the apps could be used against them in future criminal cases in states where abortion has become illegal.