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
Girls, let me introduce you to your new favorite app of ALL time!! Flo is such a lovely forum that is built especially for girls to talk about their problems during puberty and becoming a woman. I personally learned a LOT from this app than I have ever anywhere else. The community in here is THE nicest, everyone is supportive, charming, and so friendly!! Honestly you will spend more time here than on social media, which is what you need as this is both educational and interesting!! GIRLS COME OVER 🥺🥰
Developer Response
Hello mereyli,Thank you for sharing your positive experience with our Secret Chats! We really appreciate your feedback. We’re constantly working on improving Flo and we hope that we can make it even more useful and interesting for you in the future.Kind regards,Flo Support Team
Lost money and couldn’t get it back
Belieall
I downloaded the app, used it for a while, but every time I opened the app I was bombarded with offers of prolonged free trial. I must have accepted one of them, but didn’t notice the fact they would charge me for a yearly subscription. Because of the fact I rarely opened the app and didn’t check my subscriptions, and wasn’t notified before being billed, I got charged a lot of money. Contacted Apple to get a refund, but was denied my request, twice, even after explaining my reasons. I guess it’s my mistake for being inattentive, but I want everyone who reads this to beware of their manipulative tactics, and always check everything. Think twice before getting a free trial. Thank you for your attention.
Developer Response
Hi Belieall! 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
Wonderful!
reverrrrra
Well, so much is said about the app and this is actually very good. But hopefully the creators will add a feature (on the eve of the New Year) like “finals of the year”. I mean I really would like to see something like “this year you had sex 30 times, good for you!” or “there was not a single one delay in your cycle all over the year, what an amazing achievement!”That would be funny as well as interesting:)
Developer Response
Hi there! This is super helpful feedback for us, thank you! We’re constantly working on improving our app. Our product team will review your suggestion to see if it's possible to implement anything similar to make Flo more useful to our users. Best regards, Flo Team
I’m sorry
safromkazakhstan
I don’t know how it happened, but your application has written off a lot of money from me. and now is a very difficult time for the whole world in connection with the pandemic. please, if possible, return my money to me and I will delete your application, since I need this money to treat the cat and every cent is important. I hope for your understanding.
Developer Response
Hi safromkazakhstan,We're really sorry to hear you have this issue. 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
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 10.1.0
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
1,790.00₸
Ovulation Tracker
Understand your fertile days
999.00₸
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
This app has an age rating of 13+ with content restrictions. Some content may be rated higher, but access is managed by the developer through in-app controls.
