Market Trends
Welcome to Flo, the trusted period tracker, ovulation tracker, and pregnancy app used by millions 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 440 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 recognized 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 personalized 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
Can Flo support my 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 organization 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, personalized insights
What do I get with Flo Premium?
- Daily, personalized insights
- Expert-led video courses on fertility, pregnancy, and birth
- In-depth pregnancy features for every milestone and baby stage
- Symptom Checker** for PCOS, endometriosis, and fibroids symptoms
- Ovulation insights to support your TTC journey
- 24/7 virtual Health Assistant
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, December 2025
**Symptom checker not available in the UK or EU
Privacy Policy: https://flo.health/privacy-policy
Terms of Use: https://flo.health/terms-of-service
Product Positioning & Context
Community Voice & Feedback
I’ve been using Flo on and off since I was a teenager. I’ve tried others, and keep coming back. The main reason I keep leaving is because I cannot handle the constant ads for premium. It truly drives be bonkers having to x out of up to 3-4 premium ads and ‘offers’ just to get to the core function of the app. I’m happy with the basic function, and if I wanted premium I would have bought it the first 100 times it was offered to me. I’m honestly thinking about leaving the app again because I don’t even want to open it anymore.
I’ve used this app for years, and I canceled my subscription because of the obscene amount of pop ups. It’s like browsing the web in 2003 amount of pop ups. The free version has less pop ups. But I wish the app developers would add a toggle to turn them off. They are so incredibly annoying.
Edit: the app developers seem to think the free version is what I was complaining about. It’s the paid version that I am complaining about. The free version has less pop ups and is less annoying to use.
Edit: the app developers seem to think the free version is what I was complaining about. It’s the paid version that I am complaining about. The free version has less pop ups and is less annoying to use.
Ok. So I am one of those people who thinks that this is a good tool for tracking my cycle without having to use an old fashioned calendar like I used to. I have been using this app for years… and I mean years without fail and no problems, however about a month ago it kept crashing on me and wouldn’t load at all. I tried using it for several days. Tried seeing if there was an update, tried using the App Store, turned off my phone…. several people said just to just delete the app and reinstall it. Well, after much hesitation that is what happened… and I lost all of my data… YEARS of tracking my data is now gone. I’m going through perimenopause, so I’m starting to track all over again. If I had to maybe log into my account again it would have kept my data. I was so disappointed. I would also suggest maybe having a teen version for my daughter who has just started her cycle.
The cycle tracking is fine, but the CONSTANT pop ups trying to get me to buy premium are infuriating and make the app not worth the hassle. Other than cycle tracking, everything else is hidden behind a paywall that you will constantly be dry begged for. Annoying.
Edited to add: they responded to this review by sending me a paragraph dry begging me to subscribe to premium. Very tone deaf.
Edited to add: they responded to this review by sending me a paragraph dry begging me to subscribe to premium. Very tone deaf.
Not yall selling our personal data cheap snakes
This is an app designed not for women
I wish that not almost everything you have to pay for. It makes you go through this long process just to figure out that you have to pay for most of it. I was really excited about this cause it seemed to me like they were actually gonna take good care of me. I enjoy the intimacy of Flo, but not everybody can pay for a subscription.
it is a very very good period tracker and i love that you can communicate with other girls/women that are going through the same stuff as you! the only downside is the chatting part. o love being able to talk to my girls and seeing what they do during the day, but recently, when i post and there’s nothing showing in the flo safety terms in the picture, the still delete it!! please please please flo fix it!! other than that, wonderful app!
i have 4 other pregnancy tracker apps that provide information for free, why would i want to pay $15 a month for this one? it literally tells me nothing unless i pay for it. zero information whatsoever. useless.
This app would be very helpful,but they charge me for everything try and make me pay for everything,I can’t even learn things without them trying to make me pay,so I had to switch to stardust
This app is great and it helps me keep track of my period and my body pretty well. However, I hate that to get certain information you have to have premium. Honestly been using this app for a long time. It helped me realize I was pregnant with my son. It’s a solid tracker.
magda
It tell me when my period is coming it a really good app in my opinion because sometimes I worry about it being late
I loved the app then the formatting for the app started being really weird and now it is hard to do anything on the app because it seems to not take the whole screen and had black headers and footers almost. Please fix!
I don’t like how it forces you to upgrade every time you open the app.
Related Early-Stage Discoveries
Discovery Source
Apple App Store Aggregated via automated community intelligence tracking.
Tech Stack Dependencies
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