Flo achieves ISO 27001 certification becoming first period & ovulation tracker to meet world-class security standards. Read more
The #1 period and ovulation tracker worldwide
Over 250 million people around the globe use Flo as their ovulation and period tracker app, fertility calendar, and pregnancy assistant.
Understand your cycle and feel your best
If you want to know more about your body and how your cycle can affect everything from your mood to your energy levels, tracking your periods and ovulation is a great place to start.
Increase your chances of getting pregnant
By tracking your cycle and body signals, Flo helps you work out when you’re most likely to get pregnant.
Stay healthy in pregnancy
From week-by-week growth tracking to appointment reminders, you will get all the support and information you need for your body and your baby with Flo’s pregnancy mode.
Why are millions of women using Flo?
Tracking your periods and ovulation with Flo can help you calculate and predict symptoms ahead of time, getting you prepared for the days ahead.
Our team of 100+ doctors and health experts create evidence-based medical articles, tips and recommendations designed to improve your health.
With Flo, you’re in control. You trust us with your personal information, so we’re open about how we keep you safe. And we’ll never share your health data with any company but Flo.
What people say about Flo
The best period tracker app. This app is awesome, you don't get unnecessary contents, there's a separate page for topics that you want to know or discuss about. It's so easy to use.
Very useful app. Predictions are accurate too. Provides good guidance and education on female reproductive health. Helped me track my periods until I got pregnant. Very good app.
Best menstrual cycle tracker. Plus I upgraded to premium and the features are great. More like an all around health app. Nutrition plans, sleep courses, daily health care advice from doctors for women.