Period Calendar Period Tracker is a highly rated app trusted by over 300 million users across 63 countries. Designed for tracking menstrual cycles, it helps you monitor your periods, blood flow, ovulation, and fertility, making it ideal for both women trying to conceive and those seeking natural birth control methods.

This app stands out by accommodating both regular and irregular cycles. It operates like a personal diary where you can log menstrual flow, symptoms, moods, BMI, temperature, sexual activity, and more. The customizable pill and period reminders ensure you never miss important dates, with discreet notifications to maintain your privacy.

Period Calendar offers detailed fertility tracking with ovulation calculators and predictors, fertile symptom tracking, and intimacy logs. It also includes robust data backup options via Google account and email, strong security features including multi-account support, and compatibility with Wear OS devices for convenient reminders on your wrist.

Your privacy is a top priority—no account creation is required, and all data is encrypted and fully controlled by you. You have the option to delete all your data instantly with no collection or storage by the app's developers.

In summary, Period Calendar is a powerful, user-friendly, and secure app for anyone looking to better understand their menstrual health, plan pregnancy, or manage birth control effectively.