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’ve been using the app since 2019, super happy and useful (team flo all the way!) However, this app has so much potential beyond the cool app it already is. These include: 1) More specific data = more accurate insights and better personalization. Sometimes I don’t find the options that describe my mental / physical state properly. For example, mood could have more options. Not too many to ruin the experience but enough to capture the spectrum of emotions (angry or annoyed for example or even experienced trauma as oppose to being stressed) or physical symptoms like more common symptoms such as stomach ache or allergy or whatever does impact the cycle directly or indirectly.2) within the same day, I could have a mix of emotions and physical symptoms that don’t necessarily show itself in chronological order in my reports, which would allow me or even flo to drive insights from or recommend content for me that could help. For example, if I see in my report that I experience X mood/symptom usually before bed or when I wake up, that’s a pattern.3) more mental health stuff! I loved the updates incorporated to tackle mental health topics on flo, I think this can be capitalized on for future upgrade ideas! Always recommend this app to friends. It’s the best in the game 👍🏼
Best app ever!
Lolydall
I’ve been using Flo since 2021, and it’s truly the one app I can’t live without. It has never let me down; it completely organized my life and gave me peace of mind with its incredible accuracy and user-friendly interface. However, it's disappointing that while Flo supports over 20+ languages, Arabic is still missing. This is the only flaw in an otherwise perfect app. I hope the developers realize how many Arabic-speaking users rely on Flo and add AR language soon. Despite that, it remains the most reliable health companion I’ve ever used.أستخدم تطبيق Flo منذ عام 2021 وحتى اليوم، وهو بصدق التطبيق الوحيد الذي لا يمكنني الاستغناء عنه أبداً. خلال هذه السنوات لم يخذلني مرة واحدة؛ بفضله ترتبت حياتي وانضبطت مواعيدي بشكل مذهل، فهو يتسم بسهولة استخدام فائقة تجعل متابعة حالتي الصحية أمراً ممتعاً وبسيطاً. العيب الوحيد الذي يمنعه من الكمال هو عدم دعمه الكامل للغة العربية، وهو أمر أتمنى رؤيته قريباً ليناسب جميع المستخدمين العرب، لكنه يظل الأفضل في مجاله.
Developer Response
Hi Lolydall! Thank you for your review and interest in Flo. We understand that it might be frustrating for you to use English instead of Arabic in the app. It hasn’t been added on iOS because of some technical difficulties. We appreciate your feedback and we’ll make sure our product team knows about your request.
Arabic Language Support Needed in Flo App!
Ro3é
Flo is one of the best apps for tracking menstrual cycles and women’s health, with a beautiful and easy-to-use interface, as well as accurate predictions and useful information. However, it unfortunately does not support the Arabic language!It doesn’t make sense for the app to support 22 languages and not include Arabic, especially since millions of women around the world speak it! This is a significant gap that makes the experience uncomfortable for many users.We urge the addition of the Arabic language so that the app becomes more inclusive and beneficial for everyone! Language support is very important, and I hope the app will be updated soon to include our Arabic language, which certainly deserves to be among the available options.تطبيق Flo من أفضل التطبيقات لتتبع الدورة الشهرية والصحة النسائية، بواجهة جميلة وسهلة الاستخدام، بالإضافة إلى دقة التوقعات والمعلومات المفيدة. لكنه للأسف لا يدعم اللغة العربية!من غير المنطقي أن يدعم التطبيق 22 لغة ولا تكون العربية من بينها، رغم أن ملايين النساء حول العالم يتحدثن بها! هذا نقص كبير يجعل التجربة غير مريحة لكثير من المستخدمين.نطالب بإضافة اللغة العربية حتى يكون التطبيق أكثر شمولية وفائدة للجميع! دعم اللغات مهم جدًا، وأتمنى أن يتم تحديث التطبيق قريبًا ليشمل لغتنا العربية التي تستحق أن تكون ضمن الخيارات المتاحة.
Developer Response
Hi Ro3é! Thank you for your review and interest in Flo. We understand that it might be frustrating for you to use English instead of Arabic in the app. It hasn’t been added on iOS because of some technical difficulties. We appreciate your feedback and we’ll make sure our product team knows about your request.
The most accurate period tracking app
Nourvidx
I love this app so much, i have been using it since 2020, when i saw how accurate it was, i told all of my family members and friends about it, the problem is, i cant put it as a widget since i updated my iPhone to ios16, i used to track my period in there but since i cant anymore i forgot i had to track my period until i was shocked it was 2 days ahead when i logged into the app
Developer Response
Hi Nourvidx! We really appreciate your feedback! With the iOS 18 update, Apple has discontinued support for legacy native widgets. This means that with iOS 18, Flo widget is no longer accessible. We can confirm that we are already working to develop the new native widget for iOS. We sincerely apologize for any inconvenience this may cause. Yours, Flo
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 10.0.0
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
SAR 49.99
Ovulation Tracker
Understand your fertile days
SAR 42.99
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.
