Flo Cycle & Period Tracker

Flo is a science-backed period tracker, ovulation tracker, fertility, and pregnancy app used by over 500 million* women worldwide. Whether you’re tracking your period (regular or irregular), trying to conceive, following changes to your baby and your body during pregnancy, or navigating perimenopause symptoms, Flo is here to support you. Join 500 million users* who use Flo’s science-backed insights, created with 100+ doctors and medical experts, to better understand their menstrual cycle. Is my data safe with Flo? Your health data deserves the highest level of protection. Flo was recognized as ISO 27001/ISMS Team of the Year at the 2025 PICCASO Privacy and Security Awards, honoring our excellence in information security management and long-standing commitment to privacy-first design. - Anonymous Mode: Use the Flo period tracker without linking your name, email, or personal identifiers - Dual ISO certification: Industry-leading security standards to keep your data safe - Secret Chats: Connect with like-minded members who share tips and personal experiences Why choose Flo for period and ovulation tracking? Flo is more than a basic calendar — it’s a smart period tracker designed