Apps that track menstrual cycles or fertility collect a trove of sensitive data about users. Since the Supreme Court overturned Roe v. Wade last Friday, striking down the constitutional right to an abortion, some of those app companies are moving to change how they handle that data. On today’s show, WSJ personal tech columnist Nicole Nguyen joins host Julie Chang to discuss how that data is collected and shared, and what to look for if you want to keep your information private. Learn more about your ad choices. Visit megaphone.fm/adchoices