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
- Flo for Partners: Share updates like menstrual cycle predictions or pregnancy progress, and always stay in control of what you share with your partner
- 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
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 purchased a subscription for a year for this app and noticed that I was missing a feature with contraceptives control.Reminders are coming, but I can't control my schedule.1) Note whether I took a pill or missed it.2) Note how many pills I need to take per month (for example, in my case 21)I hope this will be supplemented in updates! :)
Developer Response
Hi a.lihusina! Thank you for choosing Flo! The app will know which contraception you use after you set reminders for it. This can be done via Menu - Reminders - Contraception (on) - Type - Select the type you use. If you choose oral contraception, Flo is going to offer you to select the number of pills you take. Kind regards, Flo Team
Mission impossible to reach customer support or get any help
Elinator88
I downloaded the app last week or so and wanted to see what it was and realised it is not for me and deleted it. This morning I receive a message from bank I was charged a subscription fee for a year. I logged into my App Store - nothing , I got the app and logged there and it shows no subscriptions . I paid for something and I can’t even find how this happened or how I can reverse it . to contact support I need to … download the app… ! Absolutely ridiculous CX and helpline .
Developer Response
Hi Elinator88! We’re very sorry to hear that. You can find information on cancelling your web subscription here: https://help.flo.health/hc/en-us/articles/360057837892- Please contact us directly from the app if you need assistance: Menu — Help — Contact us. We’d be happy to help! Kind regards, Flo Team
Misleading on in-app purchased
StarSatire
The app looks amazing and the on oboarding experience is designed really nicely. The thing I didn't appreciate was the unskippable subscription step. If the app requires subscription to function, it shouldn't be marked as free. Or not hide the free plan in subscriptions. Canceled the free trial (had to select it to pass the step), will see how the limited version works in two weeks - if it works at all.UPD: despite developer's reassurance that their free version is nice and solid in functionality- it is very much NOT. You can see your term, while being screamed at about buying Premium after touching literally any icon, link or article. Lovely preying UX, dear mommas
Developer Response
Hi there! We’re very sorry to hear that! We really want to help you, but we need to know your identifier in the app to find the reason for the issue and provide a solution. Please contact us from the app (Menu - Help - Contact us), and we’ll get back to you with more details on your request. Kind regards, Flo Team
Not enough free options!
Emilia.pj
I really like this app! If u want to use it to only to see when is your period coming its perfect, but if u want to see more like tips and tricks u have to pay. Overall pretty design, perfect for tracking your period and ovulation but not enough free options!
Developer Response
Hello! We acknowledge your concerns regarding features now exclusive to Flo Premium. The funds from Premium subscriptions enable us to enhance the app while ensuring basic cycle tracking remains free for all. We appreciate your feedback — please reach out to us at support@flo.health. Best, 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 9.105.0
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.
