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
Hi there, I just updated the app to the newest version and I miss the small icons showing overview of my BBT, weight, steps etc. that were placed under the big circle showing period day. Is there any way how to get it back in my settings?Thank youKatarina
Developer Response
Hi there,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.Best regards,Flo Support Team
A thing to improve
v_koslik
Heyy, I truly love this app. I had it for about two years and it really helped me with many questions I wasn’t comfortable talking about with others. I really enjoyed all the statistic, reports and many more that were available at all time.However, the new version allows me to enjoy all of the above only after purchasing the premium version. I do not find this fair for a customers that used the app before and had all the features. Also, I feel like this a marketing strategy is offensive. As a woman I did not choose to have menstruation cycles. There are many topics that aren’t talked about enough or not at all. Especially when it comes down to young adults. Teenage girls many times aren’t comfortable talking about how their bodies are changing and everything around it. I believe that many young adults do not make their own money yet. I am confident in thinking, that it would be the right thing to do, if Flo could give student discounts or premium version for fee for adolescents.
Developer Response
Hi v_koslik! It’s feedback like yours that helps us to continue to improve our app - thank you! 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
A questionable promotions
non premium user
Hey the app is good overall and it works pretty accurate but I received a suspiciosly high discount and when I asked the support what is a standard price they replied, they can't tell me because it varies according to regions. Then I asked them about my region and they refused to asnwer me either and stated I have to check it in my app, refusing giving me an answer.The promotion I got said: "your anniversary gift 86% off forever" and the price after 86% off was 16,49€ per year, which means that the original standard price for my region would be 412,25€ a year🤡I find this kind of promotions purposely gullible..
Developer Response
Hi there! Thanks so much for your feedback! You can check out the article on Pricing in our Help Center: https://help.flo.health/hc/en-us/articles/4411278780564 Please feel free to contact us directly from the app if you need assistance: Menu — Help — Contact us. We’d be happy to help! Kind regards, Flo Team
Many shortcomings
oleksandrablya
It's all well and good, but there's a huge BUT… It’s impossible to note what I crave more during my period (sweet, salty, or sour things).My partner doesn’t notice my period symptoms, doesn’t notice my preferences, doesn’t notice how much I sleep or what my mood is like. Also, my partner doesn’t receive notifications when I mark something or take part in quizzes. We’re talking about men here, come on – if you don’t tell them, they won’t figure it out for themselves, no matter how good he is. Please fix this, because even men are complaining that the app is pointless and useless.
Developer Response
Hi Oleksandrablya! We’re sorry to hear that. We put our users first and would love to hear more about how we can improve the Flo for Partners feature in the app to make it more useful. Please send your suggestions to Menu - Help - Contact us. Your feedback will be really valuable for us. Kind 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 10.1.0
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
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
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.
