Flo is a science-backed period tracker, ovulation tracker, fertility, and pregnancy app used by over 460 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 460 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, March 2026
Privacy Policy: https://flo.health/privacy-policy
Terms of Use: https://flo.health/terms-of-service
I love the app and have used it for years! This is one of the few apps that also remind you of your OC pills. However there is one problem - the number of pills doesn’t offer an option to take for example 21+21 pills in a row. Now you have to set up intake start day over and over again so the reminders keep up. This also means that the period tracker doesn’t work even though I have changed the cycle length.
Developer Response
Hi Jutta,We really appreciate your feedback!. If you’d like, we'd be happy to assist you. Please tap "Contact Support" from the app menu or reach out to support@flo.health. Hope this helps!Best regards,Flo Support Team
tf
elugi
i dont recommend using it if ur in usa because they can send ur info to the government if u have an abortion. but its a good app tho just stay safe and flo do better, u should be on womens side!
Developer Response
Hi there! We will do everything in our power to protect the data and privacy of our users. We hear your concern. We will soon be launching a new feature called “Anonymous Mode” which allows you to remove your personal identity, including your name and email address from your Flo account. This mode will make it so that no entity can identify you. We will be sharing more details with you in the coming weeks. Yours, Flo
Would give five stars, BUT…
Princess Lumi
Such a great app for tracking cycle, how ever the only issue is that there are way too many ridicilous notifications pretty much every single day: absolute nonsense with zero scientific backing and no way to turn them off.I was forced to turn of all the notifications in phone settings to cut away the junk, as there was no other option. I do not want junk mail, I do not want junk notifications either.All I wanted was to hear once a month, when are my periods starting and now I can not use this app for the specific purpose I downloaded it for. Extremely disappointed. Please fix this issue, thank you.
Developer Response
Hi there! We really appreciate your feedback! We understand that notifications can be a sensitive feature and not all users would like to get them. At the moment, there is no option in the app to keep cycle notifications but to disable other notifications. Your feedback, however, is valuable for us and we’ll pass it to our product team for further review. In the meantime, we can only offer you to disable all notifications for Flo in the settings of your device, though this will unfortunately affect cycle notifications as well. Thank you for your understanding. Best Regards, Flo Team
Daily insights about cycle are annoying
poyrye
Please add an option to disable the daily cycle notifications. I don’t want to turn off all notifications because some of them are actually useful. However being bombarded daily with absolutely useless one’s is really starting to piss me off and making me consider switching to another app. I have used Flo for years and these daily insights weren’t a thing always, adding them was not a good idea especially when you don’t allow users to toggle them off.
Developer Response
Hi poyrye! We're very sorry for your experience. We send notifications so that our users can learn about new features and insights in the app. At the moment, it’s only possible to disable the notifications by turning them off in your phone settings. After doing so, you’ll stop receiving any notifications from Flo, unfortunately. We really appreciate that you shared your feedback with us - we will add your suggestion to the list of feature requests that are reviewed by our product team on an ongoing basis. Best Regards, 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 10.4.0
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
3,99 €
Ovulation Tracker
Understand your fertile days
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
