Flo Period Tracker is a smart and simple way to track your cycle. Flo makes accurate and reliable predictions of menstruation and ovulation using machine learning (AI). All women, even those with irregular cycles, can rely on Flo. Log your days in a handy calendar, schedule cycle reminders, record moods and symptoms, and take full control of your health.

Wondering when you had your last period? Want to know when your next period is coming? With Flo it’s easy to keep track of your cycle.

Listen to yourself, note your mood and symptoms to understand how they influence your health.

Flo lets you:
- schedule reminders and get notifications of ovulation, menstruation, contraceptives and other pills;
- keep your cycle and symptoms history and analyze it using graphs;
- manage your lifestyle: add your daily sleep duration, water consumption, physical activity, all in one place;
- sync your data with Apple Health App;
- track basal temperature, pregnancy tests results and know your fertility days, if you are trying;
- find out more about your body and cycle – get personalized health insights every day

Tracking periods was never that easy! Download the app and join millions of women who trust their cycles to Flo.

What's New

Version 4.3.1

A new useful update is live now and the next one is coming soon!

What’s new in this version:

- New and improved pregnancy mode!
- Minor bugs were fixed.

We carefully read your reviews so don’t forget to write about the features you like in the app and about the things you’d like to change.

Ratings and Reviews

4.8 out of 5

172.3K Ratings

172.3K Ratings

Amazing but needs a touch.


Don't get me wrong, Flo is amazing and you'll never use another app after you download this but it could use a few touches. The one idea I have isn't really important but if you want to have more fun with the app you should also have the choice of using your own photo for a background picture. Doing this would make it a little more fun along with being able to choose the color of the circles or bubbles. Also, it would be cool if people could make their own articles for everyone to read but make a separate column you can click on, incase viewers don't want to read other people's. And lastly, the articles usually talk about tampons. Not everyone wears them including me. It would be great if you could tell everyone how they work and if it hurts. I personally am really sensitive about "down there" and it would be great to know what it's like. Or even talk more about pads. Right now I read things I can on the internet and see how to insert them and everything. But I rly think sticking something up there is really nasty. Again just my opinion. But overall this game is really good. If it was just a little more fun and fit for everyone I would be giving it 5 stars. But hopefully something I said can come true.
To Whom Ever It Regards,
- Unknown☺️

Pretty good


The reason I downloaded this app was because I have fairly irregular periods. They have always been irregular, but I discovered that I have hypothyroidism which contributes greatly to irregular periods. I am also breastfeeding and have been breastfeeding for 18 months. I do notice that when I take my thyroid medication my periods become a lot more predictable and more normal. So, with that being said I did not expect this app to be spot on for me. I am just not one of those women who have a really predictable cycle. If you have a predictable cycle than this app will work great for you!! It tells you ovulation days so you can try (or avoid) getting pregnant. It reminds you when your period is due which is nice. Since my periods aren’t regular it took about 4-6 cycles to actually get the app to correctly predict my periods which is understandable. It’s important to log all your symptoms because that’s how it tells which phase you are in. This month it said I was supposed to start, but when I updated my symptoms, it changed the date I was due for my period. My period actually came 3 days before it was “due” but still, that’s pretty good guessing with someone who has irregular cycles. I do also love that they have articles you can read that educate you about your body. 4.5 stars.

Love it but need some improvements


Even before I discovered that you can text other people it was really helpful. But now that I’m able to contact others anonymously and talk about real world stuff that you would be embarrassed to about outside of the app, it’s a hundred times better. I only wish you could see notifications for when people respond to your comment. Like an social media (I don’t think this is social media) it’s stressful putting something out there in the world and waiting for answers. Especially if it’s important, having to scroll through so much just to learn that you didn’t get a response it’s annoying. Having notifications that tell you if someone liked your comment or commented on it will relieve stress and make things simpler.
Also, if your looking for a period app this one is really cool. It has easy to work period schedules, hooks right up to your iPhone health app and has really cool information. I know I have definitely learned a lot from it, and I feel much better about myself after reading articles on it. It’s also a great community of girls, girls who will stand up for you and are really empathetic and helpful.


110.6 MB
Health & Fitness
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Danish, Finnish, French, German, Hindi, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Vietnamese
Age Rating
Rated 12+ for the following:
Infrequent/Mild Medical/Treatment Information


  • Family Sharing

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

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