• The most downloaded Health & Fitness app in App Store worldwide (August 2019)
• App of the Day in App Store in over 30 countries
• Partner of United Nations Population Fund in the area of reproductive health
• Over 9M women got pregnant with Flo
• Featured in Vogue, Glamour, Women’s Health, Refinery29, Cosmopolitan, Elle, Wall Street Journal, TechCrunch, Venture Beat, MTV, The Guardian and more

Flo Period Tracker, Ovulation & Fertility Calendar! It’s a smart and simple female period tracker, helpful pregnancy week by week app, accurate ovulation and fertility calendar and PMS symptoms tracker for women all over the world. Flo Period Tracker not only tracks your period accurately, but it’s also a reliable pregnancy calculator, ovulation calendar, and true fertility friend for you. It’s the first period app, pregnancy calculator, fertility and ovulation calendar for women that uses machine learning (AI). All women, even those with irregular periods, can rely on this health tracker. Log your menstruation days in a handy period calendar, ovulation and fertility tracker, schedule menstrual cycle reminders, record moods and PMS symptoms, use a due date calculator, follow a pregnancy calendar and take full control of your health.
Want to know when your next period is coming? Confused by PMS symptoms? Want to take your birth control pills in time? With Flo female period tracker, ovulation and fertility calendar it’s easy to keep track of your menstrual cycle.


• Track your cycle, period and PMS
• Log the start date, the end date of menstruation and fertile days
• Follow days favorable for conception in the fertility calendar
• Get predictions for upcoming periods, ovulation and fertility
• Log more symptoms to get improved predictions if you have irregular periods


• See countdown to the birth of the baby
• Track the week of pregnancy
• Get interesting articles on pregnancy


• Keep your cycle, ovulation, fertility and symptoms history
• Analyze your cycle and period duration, weight changes and activity during the cycle
• See the graph of your BBT and ovulation


• Find out more about your body, cycle, ovulation and fertility
• Get daily health insights based on your data
• Import your data from Fitbit and Health App


Want more from Flo? Get Flo Premium and enjoy:
• Personalized Insights Based on Your Symptoms and Cycle Phase
• Detecting Physical and Emotional Patterns
• Health Report for Doctor

Our standard subscription options are: 1-month subscription for $9.99, 3-month subscription for $19.99, 6-month subscription for $39.99, 1-year subscription for $49.99 or equal to the same price tier as Apple App Store Matrix determines as the equivalent of subscription price in USD.

• 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 Period & Ovulation Tracker & Fertility Calendar

What’s New

Version 4.56

Dear Flo community,

We have a new type of notification available:

- Check your Secret Chats notifications (the section with a bell icon) to see how many likes your comment has received.

Always yours,

The Flo Team

P.S.: If you like our app, please rate and review us!

Ratings and Reviews

4.7 out of 5
3.2K Ratings

3.2K Ratings

ta_pau ,

Usefull and very nice app

Very nice app and really useful to track your period. I found really handy the notes about moods, well being, weight and symptoms for every day to predict what is going on.

kristytoman ,

In love with Flo

I was thinking about the premium account but as a student I have very low income for paying the price that is kinda high. Thank you so much for your Christmas gift I would say it was one of the best gifts I got this year! On the other hand there are still bugs that need to be repaired. For example the notification button on the main page of secret charts doesn’t work and the same with the contact support - there’s shown a message that it doesn’t have my mail address even thought it has. I have Flo for 3 years and it has made a huge progress and I am really proud of it. Thank you so much

Developer Response ,

Hi there,

Please contact us at Be sure to specify your problem, your device, and the amount of free space on it. We'll be happy to assist.

Best regards,
Flo Support Team

Maria Šimková ,

Great app! Interface suggestion

Really love the app! Graphs&Reports function is something that distinguishes it from other cycle tracking apps. The interface is very convenient and clear, but the only thing i think it is missing is a possibility to view the current cycle visualized as a circle (in addition to “Today” and “Calendar” views). That would make the app absolutely perfect.


174 MB

Requires iOS 11.0 and watchOS 2.0 or later. Compatible with iPhone, iPad and iPod touch.


English, Danish, Finnish, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Vietnamese

Age Rating
Infrequent/Mild Medical/Treatment Information
In-App Purchases
  1. Flo Premium 2 850,00 Kč
  2. Period Tracker Premium 1 month 259,00 Kč
  3. Period Tracker Premium 3 month 539,00 Kč


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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