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 recognised 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 to help you notice patterns over time.
- Log 70+ symptoms and moods to receive more personalised menstrual cycle insights
- Support for irregular periods, pre-period symptoms, and cycle changes
- Clear summaries you can share with your doctor
- An accurate period tracker to help you plan ahead with confidence (Flo is not a method of birth control)
Can Flo support my Trying To Conceive (TTC) journey?
Flo offers educational features to support your journey to conceive and better understand fertility.
- Fertile window and ovulation predictions based on your logged period data
- BBT (basal body temperature) tracking
- Daily insights to help you prepare to conceive a baby
- Partner tools to support shared awareness
How does Flo support my pregnancy by week?
Once you conceive, switch to Flo for Pregnancy for useful checklists and structured, week-by-week guidance.
- Pregnancy tracking with weekly updates as your baby develops
- Visuals and diagrams to help explain pregnancy changes
- Symptom tracking, reminders, and organisation tools
- Expert-reviewed content and community stories for peace of mind
Is Flo suitable for teens and first periods?
Flo provides a safe space for teens to track their first period with age-appropriate education, helping them navigate puberty confidently.
Can Flo help me manage perimenopause symptoms?
Track changes during perimenopause with tools designed for this life stage.
- Perimenopause Score to follow symptom changes month by month
- Track cycle-related changes in sleep, energy, mood, and well-being
- Clear, personalised insights
What do I get with Flo Premium?
Unlock deeper, personalised insights and advanced tracking tools with Flo Premium.
- Daily, personalised insights
- Expert-led video courses on fertility, pregnancy, and birth
- In-depth pregnancy features for every milestone and baby stage
- Ovulation insights to support your TTC journey
- 24/7 virtual Health Assistant for educational support
- Flo for Partners: Share updates like menstrual cycle predictions or pregnancy progress, and always stay in control of what you share with your partner
Medical disclaimer
Flo does not provide medical advice, diagnosis, or treatment, and is not a method of birth control. Predictions are for informational purposes only. Always consult a qualified healthcare professional.
Download Flo today and join millions using a trusted period tracker, pregnancy app, and fertility companion.
*Total number of users who downloaded Flo, July 2026
Privacy Policy: https://flo.health/privacy-policy
Terms of Use: https://flo.health/terms-of-service
Great app but I don’t think females should have to pay to Learn things about their body or pay for things that can help us take care of ourselves or work out routines to help with cramps like come on these should be free why we have to pay for that kind of knowledge?
Developer Response
Hi there!Thank you for sharing this. We’re sorry to hear you’re disappointed that we moved some features out of the free plan. Premium subscriptions fund the ongoing development of the app, while keeping the basics free for everyone. We welcome your feedback. Please email us at support@flo.health. Kind Regards, Flo Team
😊😊
M_R_Z_F
Great app 👏🏽💯
Developer Response
Hi there,Thank you for your kind feedback! We’re really happy you like our app. We're constantly working on improving the app and hope that we can make it even more useful for you in the future.Kind regards,Flo Support Team
Love the app but hate having to pay for everything.
kasedii
Why do I have to pay for almost everything now?
Developer Response
Hi kasedii,Thank you for reaching out. We really appreciate your feedback on version 5.0 of Flo.With the update, we’ve moved some features from the free plan to the premium plan, so some of the content that you may have seen on the free plan is now available only to our premium subscribers. The core features of our app (cycle tracking and prediction) remain free for everyone.Additionally, with Flo Premium none of our users receives irrelevant ads, and your data is safe and secure – regardless of whether or not you’re a subscriber.Just to give you a glimpse of the team that is working on Flo app. Flo now has over 80 medical and health experts from medical schools and universities – OBGYNs, Endocrinologists, Psychologists, Dermatologists, Dietitians, and more. They make sure all the content in the app is evidence-based and trustworthy. Our product managers and engineers work day after day on the functionality of the App, so that what you see in Flo is tailored to your needs, goals, and symptoms. Every day we work hard on implementing industry best practices and standards in data security. These are just some of the costs to create a product that helps you on your journey to becoming your true best self, healthier, and happier, every day.We encourage you to check out the premium version. Each day you’ll find personalized actionable tips based on your unique cycle phase and changes in hormone levels. In addition, you can find tons of helpful information in our new Insights section, a rich, robust, and searchable library of multimedia health and well-being content that has replaced Health Insights.Here at Flo we have a lot of plans on how we can take female health to an entirely new level and make our app even more useful and supportive for you. And we are glad to have you amongst our users.If you have any other questions, please reach out at support@flo.health. Your feedback is truly valuable, and it helps us improve the app for you and for many other women around the world.Kind Regards,Flo Support Team
Premium
nsususmnx
I don’t like the fact that I can’t get off of being on premium mode. That was not authorized by me
Developer Response
Hi there! We’re sorry to hear that! The only way a user can sign up for a subscription is by tapping Continue on a screen that offers Flo Premium and confirming their consent with their password or Touch/Face ID or by subscribing at app.flo.health. If you contact us directly from the app (Menu - Help - Contact us), we’ll be happy to help!Flo Team
Dear Flo Community,
This is a technical update that helps us improve our app and make performance even better.
Thank you for updating!
Always yours,
The Flo Team
P.S.: If you like our app, please don’t hesitate to rate and review us
Version 10.6.1
Subscriptions
Flo: Cycle Tracker
Connect your life & your period with Premium
Free Trial
Flo Pregnancy Tracker
Flo Pregnancy Tracker
Free Trial
Flo Birth Control Reminder
Set reminders for your birth control method
Free Trial
Flo Women's Health & Wellbeing
Trusted Information backed by health experts
USD 4.49
Ovulation Tracker
Understand your fertile days
USD 9.99
The developer, FLO HEALTH UK LIMITED, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Purchases
Location
Identifiers
Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
Health & Fitness
Purchases
Location
Contact Info
User Content
Search History
Identifiers
Usage Data
Sensitive Info
Diagnostics
Privacy practices may vary based, for example, on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
