Discover the most popular female health & well-being guide chosen by 200M women, co-created with 100+ leading health & medical experts, and acclaimed medical institutions.

• Partner of the United Nations Population Fund in the area of reproductive health
• 100+ doctors and health experts are part of the Flo Medical Board
• Thousands of women log pregnancies every day on Flo
• App of the Day in the AppStore in over 30 countries
• Best Fertility App 2020, Healthline

No matter your life stage or reproductive goal, personalize Flo to make it unique and relevant to you. Based on advanced AI technology, Flo helps you to monitor your cycle, fertility, or pregnancy accurately. As a one-stop solution for all things female health and well-being, Flo provides all-in-one tracking for period start date and length, fertile window, peak ovulation days, PMS symptoms, flow intensity, birth control, water intake, sleep and step counter, and much more. Follow your baby’s growth weekly during pregnancy.

Your cycle is so much more than your period. Every woman experiences different symptoms, mood swings, and energy levels each cycle phase. Together with a team of 100+ health experts, Flo helps you to understand your body better. Explore accurate cycle predictions and tips on how to benefit from your cycle phase and hormone levels for clearer skin, better workouts, and increased energy levels.

Discover a personal journey to motherhood with Flo. Get pregnant as soon as naturally possible for you by identifying your most fertile days and receiving tailored insights. Flo’s pregnancy mode gives you access to beautiful images to follow your baby’s growth weekly. Calculate your due date, set a countdown, and learn the essentials of newborn care.

Log 70+ symptoms and activities to get the most precise AI-based overview of your body’s patterns. Keep a diary of your weight, water intake, physical activity, sex drive, moods, and PMS symptoms to monitor changes and receive accurate predictions. Get access to an entire health & well-being multimedia content library with articles, videos, and surveys.

Schedule reminders when your period is approaching, its start and end date, your ovulation day, and personalize Flo to get notifications about weight, sleep, water intake, step goal, and birth control.

Get access to your monthly health report with personalized cycle graphs, and indications of your body’s patterns. A virtual health dialog will provide proactive information based on your unique profile and symptoms.

Safely discuss intimate topics, ask questions anonymously, and get support from one of the largest female communities worldwide.

Flo uses HealthKit to export your Flo activities to the Health app and to read menstrual cycle data.

Flo offers a subscription plan that gives you a more personalized experience and unlimited access to the entire health & well-being multimedia content library

• Payment will be charged to iTunes Account at confirmation of purchase
• Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period
• Account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal
• Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase
• Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable

For more information please visit the link
Privacy Policy:
Terms of Use:

Download this period diary and join millions of women who trust their cycles to Flo

What’s New

Version 8.1

Update your app and unleash your potential with your new cycle health forecast. You’ll get enhanced daily predictions on your symptoms, wellbeing and more to help you better plan your life around your cycle.

Explore new and improved My Daily Insights to help you take on the day with confidence:

*Today’s cycle day*
Get a closer look at your hormones and how they might make you feel today. Plus, Premium users can unlock today’s cycle wins and challenges and be even more prepared for the day ahead. Glowing skin? Greater stamina? Breast sensitivity? Be ready for it all.

*Today’s symptoms*
We’ll help you listen to your body’s signals by showing you what you may feel today. Premium users can also get an advance look at the symptoms they might have tomorrow, as well as expert insights on today’s symptoms with our videos and articles.

*Today’s discharge*
Do you know how to read your discharge? We’ll show you what discharge you can expect today and how you can identify it. Premium users can also get a closer look at what their discharge means for their cycle health, and discover the different kinds of healthy discharge.

*Chance of getting pregnant*
If you’re planning to get pregnant, you can instantly find out if you’re close to ovulating today. Premium users can also see if they’re in their fertile window this week. That way, you always know the best times to conceive.

Plus, we have more features and improvements to help you plan around your cycle:

*Enhanced cycle history*
You now have a more detailed record of your cycles to show your doctor – whenever you need it. You can instantly spot if there are any changes in your cycle or period length that you might need to keep an eye on. And you can find your period date, ovulation date and fertile window all in one place.

*Upgraded ovulation panel*
If you’re trying to get pregnant, check out our improved ovulation panel where you can log your strip and digital ovulation tests and keep track of your results. Plus, we know those strip tests can be a bit tricky to read – so our new color decoder can help you record an accurate result.


The Flo Team

P.S. If you like Flo, please consider rating the app and leaving a review. Ratings and reviews help us support more people like you.

Ratings and Reviews

4.8 out of 5
781.3K Ratings

781.3K Ratings

Claire3513 ,

Paramount to My Conception

Update: I had no idea this app turned into a pregnancy tracker after you miss a period. Amazing!!! Adding 1 more star for a full 5 star review. I still think the free content is far better than the paid content and the anonymous chat should go away, so much negativity there.

The free features of this app are a million times more valuable than the paid features. The period and ovulation tracker was paramount to my husband and I conceiving - I’m terrible at keeping track of these things on my own (usually my period just sneaks up on me). The symptom tracker and the “dive into your cycle day ##” feature were especially helpful in recognizing that I was showing signs of being pregnant, rather than just experiencing PMS. Because the free features were so helpful, I tried the trial of the paid version and was very disappointed in what it included. Especially the “chat with other future moms”...oh my goodness, get rid of this, it’s just a platform for women to work each other up into frenzies over trying to conceive. It’s comical at first, “anyone else want to conceive so bad they imitate symptoms?” and then sad, “I’m crying at work right now because two other women are pregnant and I’m not”, and if you keep reading it starts eating away at you...everything posted is so negative.

Developer Response ,

Hello Claire3513,
Thank you for sharing this exciting news with us! We’re happy to hear that you were able to get pregnant with Flo. 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

Fairysparkles6 ,

Definitely the best period app.

After I got my first period I used the same app for years to track it. It never predicted my period right. For the longest time I just figured I was super irregular as many girls are when they start there period, but eventually I realized It said I was consistently late by approximately the same number of days every cycle. I just dealt with it for awhile. When I finally decided to check for a better period tracking app I found Flo. This app is SO MUCH BETTER!! It usually predicts my period pretty accurately, sometimes spot on. When my cycle shifts it always makes adjustments and often becomes more accurate. I also love that it doesn’t mark your period late until A certain number of days after your cycle was supposed to start (I think 5, which is the “official” number of days that make a period considered late. It doesn’t just mark it late when your period doesn’t start the day it was predicted to. I was especially impressed when I missed a period after my wisdom tooth surgery and when I logged my next period the predictions continued to be accurate immediately after. It seems like the developers did a great job on the actual software as well as put lots of thought, research, and expertise into it. It’s a great app!!

Developer Response ,

Hello Fairysparkles6,

Thank you for sharing your positive experience! 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

kathynicole ,

Extra features only available with premium

I originally downloaded this app to track my period and my symptoms. I do still like it for that, but I also really loved when more features were added such as giving helpful bits of info about the whole cycle. This info wasn’t always that helpful for me because most of it I knew already, but I do think it’s helpful for younger people. I didn’t learn much about the menstruation cycle in school, and I just can’t imagine much has changed. It was also helpful that they gave you tips seemingly based on the symptoms you plugged in. However today I went to log my symptoms and noticed they added in stories on why we get cramps, etc., but they are all only available to premium users. And when I went to the screen that used to have helpful articles, mostly all of the information is locked for premium users. This is all information that should be provided for free. Now kids are still going to have to wade through inaccurate information on the internet because apps like this are charging for the most basic information. I understand that you need money to survive, but information menstruation shouldn’t only be available to people with money. Also you would think they could get a moderator for the chat rooms or a professional to help answer questions, but no. So the chat rooms and answers are inaccurate and overrun with teens who don’t know anything because apparently female anatomy is only available to people with money. It’s such a shame.

Developer Response ,

Hi kathynicole,

Thank you for reaching out. We really appreciate your feedback on version 5.0 of Flo.

In this version we updated our algorithms to make Flo’s predictions even more accurate and useful, as well as added in the ability for all Flo users to further personalize the app. We also moved some features from the free plan to the premium plan, which is why you may have seen popups asking you to subscribe to our premium plan to access certain types of content. Even with this change, the core features of our app (cycle tracking and prediction) remain free for everyone.
We believe cycle tracking should be available to everyone who needs it, regardless of ability to pay. For users who are interested in our more advanced options, the funds we receive from our premium subscribers enable the ongoing development of the app, and help keep the basics free for everyone.

Flo is supported by a subscription-based business model. With a subscription model none of our users see annoying ads, and your data is safe and secure – regardless of whether or not you’re a subscriber. Just to give you a glimpse of the team that is working on Flo: we now have a team of over 200 passionate, dedicated employees, and over 60 medical and health experts from medical schools and hospitals – OBGYNs, Endocrinologists, Psychologists, Dermatologists, Dietitians, and more, who make sure all the content in the app is evidence-based and trustworthy. Our product managers and engineers work each day on the functionality of the App, tailoring it to your needs, goals, and symptoms. Every day our tech team works hard, implementing industry best practices and standards in data security, to keep your data safe and secure. These are just some of the costs to create a product that helps you on your journey to becoming your true best self, healthier and happier, every day.

We encourage you to check out the premium version. Each day you’ll find personalized tips on wellness for that specific day, based on where you are in your cycle. Plus you can find tons of helpful information in our new Discovery section, a rich, robust, and easy-to-navigate library of multimedia health and wellness content that has replaced Health Insights.

Here at Flo we have big plans for how to keep improving our app to make it even more accurate, relevant, supportive, and fun for you. We are happy that you’re a Flo user, and we will be grateful if you choose to become a premium subscriber and support the work that we do. Of course, you’re welcome to use the free version as long as you’d like.
Please continue sharing your suggestions with us, and feel free to reach out at with any questions you have. Your feedback is truly valuable, and it helps us do a better job of improving the app for you.

Kind Regards,
Flo Support Team


Flo Menstrual Calendar
When is my next period? Know with Premium
Free Trial
Flo Pregnancy Calculator
Track your baby's growth with Premium
Free Trial
Flo Fertility Tracker
Ovulation & fertility tracker with Premium

App Privacy

The developer, FLO HEALTH, INC., 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, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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