PinkBird, Best Period Tracker! Period Tracker is useful, whether you have irregular periods or regular periods. Keep track of your menstrual cycles with Period Calendar. It tracks your periods, cycles, ovulation and the chance of conception. Period tracker helps both women looking to conceive and those trying to birth control. Wondering when you had your last period? Want to know when your next period is coming? With PinkBird female period and ovulation tracker, it’s easy to keep track of you