Your Period Data Should Be Private: "We recommend using Euki."

We tested six popular period and ovulation tracker apps to find out how they handle your private health data. Our privacy expert Shoshana Wodinsky did hands-on testing of 6 popular period tracking apps: Euki, Clue, Flo, Period Calendar, Planned Parenthood’s Spot On, and Stardust. Our testing found one app that stood out from the rest.