Flo Period & Ovulation Tracker


Price Category Version Released Last Updated Size Compatibility Age
Free Health & Fitness 4.6.0 Oct 03, 2015 May 16, 2018 128.5 MB iOS 10.0 or later 12+
New in version 4.6.0

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

What’s new in this version:

- Cycle predictions have been improved.
- Minor bugs 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.


• App of the Day in App Store in over 30 countries
• #1 in Health & Fitness Category among female health apps in the U.S. and over 100 countries worldwide
• The most downloaded Health & Fitness app in January 2018 worldwide
• Partner of United Nations Population Fund in the area of reproductive health
• Best fertility app 2017 - over 2,000,000 women got pregnant with Flo fem
• Featured in Vogue, Glamour, Women’s Health, Refinery29, Cosmopolitan, Elle, Wall Street Journal, TechCrunch, Venture Beat, MTV, The Guardian and more

Flo fem Period Tracker, Ovulation & Fertility Calendar is 100% free! 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 fem Period Tracker not only tracks your period accurately, but it’s also a reliable pregnancy calculator, ovulation calendar, and true fertility friend for you. Flo fem makes accurate predictions of menstruation, ovulation and fertile days. It’s the first period app, pregnancy calculator, fertility and ovulation calendar for womеn that uses machine learning (AI). All women, even those with irregular period, 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 fem 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
• Track your fertility window (fertile days) and when do you ovulate to see your chance to get pregnant with the ovulation predictor
• Follow days favorable for conception in the fertility calendar
• Analyze your current and past cycles with the menstrual tracker
• Get predictions for upcoming periods, ovulation, and fertility
• Log ovulation tests results (positive ovulation, negative ovulation)
• Track basal temperature
• Log pregnancy tests results
• 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
• Pick and change your pregnancy week by week
• See the development of the fetus
• Get interesting articles on pregnancy


• Add your weight, daily sleep duration, water consumption
• Log your physical activity, get in shape, lose weight and stay healthy
• Import of your data from Fitbit, Google Fit, the Health App
• Add travel, stress, disease or injury, alcohol consumption
• Track your sex drive, sexual activity, and moods every day
• Log your PMS symptoms
• Log your vaginal discharge


• Schedule reminders and get notifications of your period, ovulation and fertility
• Get reminders on other pills


• Keep your cycle, ovulation, fertility and symptoms history
• Analyze your cycle and period duration
• See the graph of your BBT and ovulation
• Analyze your weight changes and activity during the cycle
• Track your sleep duration and sleep debt
• Control the amount of water consumed every day


• Find out more about your body, cycle, ovulation and fertility
• Get daily health insights based on your data
• Take the surveys and get useful advice

Download this period diary and join millions of women and girls who trust their cycles to Flo fem Period & Ovulation Tracker & Fertility Calendar.


Twitter, Instagram: @flotracker

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(Needs work on app)!!
why.am.i. known on 5/22/2018
This app does not tell me the correct date of my period!! It tells me the wrong date. And i had to travel that day! This app needs work on telling he right date but everything else is fine. Used to tell me that I was late on my period. (This app needs a little bit more work on it, but it’s better then any other period app that I have ever tried.
Very helpful
Allison_holly on 5/22/2018
This app helped my understand myself and “Flo” so much better than I used to. I never used to keep track of my period or symptoms so I never knew when it show up. I downloaded the app and made sure to keep track of how I felt and logged when it arrived. The app works for you if you work for it. With regular usage, I watched it once change from saying my period was due in 6 days, to saying it was due the next day, because I logged a particular symptom. It was right too.
Love it
instagram: martinikprincess on 5/22/2018
This app really helps with tracking my period and many other things🧡
Idea for improvement?
shrugging shoulders on 5/21/2018
Does what it's meant to do, wish they would add a blood coloration parameter that would be cool. For the first time ever last month I had brown blood and I didn't know what to think of it, and then it made me consider dark thick red clumps vs light red no clump flow etc
TiiaaMiichelle on 5/21/2018
Best period tracker app out here
London NR on 5/21/2018
At first I was skeptical about getting this app, but it is amazing. It tracks your menstration cycle and gives you very helpful insights bout your health. And all of the advice given is specifically picked for you based on your daily logs, age, and size. I really do love this app.
pansexualoctopus on 5/21/2018
U should put an option that u can put in if ur period has started or not. Put it with the stuff where u choose if u have cramps, etc.
best app ever
Sydthekyyyyd on 5/21/2018
this is literally the best app ever. i should’ve started using this in the seventh grade. why has no one told me about this. i love this. i love flo
Ages for all
beach❤️ on 5/21/2018
It's unfortunate that my daughter started hers young and we're unable to use this because you don't include her birth year. Girls are getting it younger, I suggest you add 2006 & 2007
This app is amazing
Eb915 on 5/21/2018
One of my favorite apps! Very accurate, informative, and helpful.. Love it
Great App
Hebrew11@ on 5/21/2018
This is not only a helpful way for me to keep track of my cycle, but also tells me when Details about my cycle. Great app
Inaccurate ovulation dates
tintinano on 5/21/2018
Ovulation dates aren’t exactly accurate. You should let it know to your costumers.
kaylee27554 on 5/20/2018
I love this app it keeps track of everything
Great period tracker
Oliviam10100 on 5/20/2018
I honestly love this app. HOWEVER I wish there was an option when tracking birth control pills that said which day inactive/sugar pills started. I’ve just been taking it down as a note, but it’d be nice if there was some sort of indicator on the day itself instead of having to click through the days to find which one has the note. Maybe the little cycle day circles could change colors to purple or something? Having an indicator of which day of the pill I’m on would be awesome. It’s a feature that makes Planned Parenthood’s app stronger, but I love Flo so much more for the more mature interface and more organized layout that I don’t want to switch over, even though keeping track of birth control is my main focus right now.
Binx16 on 5/20/2018
I can’t say enough about this app. Anything I can think of they already thought of. I highly recommend!
Love!! Also a suggestion
Its so cool! on 5/20/2018
Easy and accurate! I wish that this has information about iuds as well. Though a tracker is not needed for an iud, it would be nice to have information about that form of contraception along with all of the other helpful tips and information.
The app doesn’t consider birth control
Forever16 on 5/20/2018
Flo is pretty good app. The only problem I have with it is that it keeps saying my period is late. But I have an IUD. Therefore I don’t get a period. So since I never log in a period, it doesn’t tell me when I’m ovulating or any other interesting things. I wish there was a way for it to tell me facts about my IUD and maybe what I should be experiencing based on how long I’ve had it.
Amazing, but...
Shannon.Nicole.R.208.201 on 5/20/2018
This app is really nice. It is a great period tracker, but it could use some improvements. I wish you could add your own photo as the background and I wish this app was Voiceover accessible. I really hope these changes happen. It would make the app 100% better!
just amazing
Unreal gambler on 5/20/2018
so so helpful, always is right about dates and gives amazing tips
Plan b
Your grandma's Bingo Bud on 5/20/2018
Hey! Is there any way we could have an option for a button that marks when you took a plan b pill?
Great but could use a few more things
lilspoon on 5/19/2018
Needs moon cycles because that’s how my period and ovulation is synced and tracked. I think it should also be more queer friendly. I don’t need to track pregnancy risk or protected/unprotected sex.
Can you add the ability to track cramp pain level?
Irjcry on 5/19/2018
I think that this would be a useful tool because it would help me to figure out which days my cramps are worse then other days
Essential app for all period-havers!
Practical botanist on 5/19/2018
This app is fantastic! I love the ease of usability in tracking all signs and symptoms around my cycle. Even though I’ve been cycling for several decades now, it wasn’t until more recently that it became important for me to pay attention to the less obvious changes in my body during this time. I wish this app had existed when I was in my teens and 20s; very liberating!!
Never gets my period right
Aodjfkfjvkf on 5/19/2018
I’ve been using this app for awhile, I really do love it. All the features and it’s nice to know when I have had my period. But the one thing that is bothering every month is it never being right on the prediction of my period. At first it was a couple days which was fine and at least I knew somewhat when I was going to start but it’s gotten to the point where it’s weeks early. Which is pretty concerning for someone who is sexually active. It always ends up stressing me out more than it needs to and then I end up getting it a week later. I know it takes time to really get down a schedule but it’s been months at least, if not a year and it has never been on time and it seems to only get farther and farther from being true. I would give it more stars if that was fixed.
Just an idea
chickennugsforlife on 5/19/2018
This is just an idea that I have. In the sex and sex drive section in the daily log there should be oral sex option. I came up with the idea because when I had oral sex with my boyfriend I couldn’t really log it on my daily log :/ but again it’s just an idea:)
Accurate and so helpful !
HappyPictaket on 5/19/2018
Life changing when if you are somewhat irregular and need to plan trips in advance :)
Celi💖 on 5/18/2018
Great app so convenient, helps me a lot and the little facts are so fun to know❤️
This app is really helpful
fronk oreo on 5/18/2018
I just got this app a few weeks ago, and it’s prediction was almost completely accurate (off by one day), but it gave me an idea of when my period would start so I could prepare and I really appreciate it
Good app but I have a recommendation
Bambamas20 on 5/18/2018
I have been using the flo app for a couple weeks now and really like it. It is more organized than other apps I have tried and it is appealing to the eye. I like that I am able to use the app to not only track my period but also track my birth control. I do have a recommendation for the reminders, however. I currently use the nuvaring and have a reminder set so it will send me a reminder when to take it out and when to insert a new one. I do think it would be helpful, however, if there was an icon on the calendar so you can see when it needs to be taken out or reinserted. It would be nice to be able to just have a quick glance at the calendar and see that you still have a while before you need to worry about it. It would just make it more convenient and would make the app overall more helpful for me by being able to see when it needs to be done as well as getting a reminder for it.
Sleepy1-2 on 5/18/2018
This app works good for me and my daughters they have the app as well it’s nice to be able to track our periods and be able to look back to make sure we are in track so when we got the the Dr. we have the info needed...
no background for babies of different race
EricaH413 on 5/18/2018
I really like this app but I recently found out I was pregnant and I see in the settings where you can change your background there’s only 2 pictures of a Caucasian baby and a Caucasian pregnant woman, PLEASE ADD MORE RACES
Sophiansjxs on 5/17/2018
this app is amazing and its great because it makes sure to let me know when my period is coming so i dont have any accidents or embarrassments. this app is also like the big sister i never had it talks about a lot of personal things girls go through! good job !
Great App!
N1kki 💋 on 5/17/2018
Good for period tracking! Even though we cannot rely on an app for chances of pregnancy, I like how it also tells us the chances of pregnancy if we were to have unprotected sex.
Love this app
พิมใจ on 5/17/2018
Love the app! Things I wish could be improved! 1. I want a way to go ahead and put that I had a PAP smear recently. And PAP smear info and conversations. I didn’t know spotting after a PAP is common and now I fear I messed my predictions up. 2. More options under daily log. Such as fighting with significant other, irritated, cravings of healthy food or greasy food or sugary food. 3. More info about vaginal discharge what’s normal what’s not. 4. More quizzes and fact sheets
Paytoncorn on 5/17/2018
I’ve found Flo to be sooo helpful with keeping up with my irregular periods. To the creators, it would be cool if the app also included symptoms, and other related features for those with PCOS and other hormonal imbalances that may impact their period and cycle each month.
Just a little bit more options ! 😎
Kslalakallalala on 5/17/2018
I love this app and I use it well. But we need more options for the cramps and bleeding. As someone who suffers from cysts, fibroids, and endometriosis I would like to keep track of level 1- 5 cramps and bleeding. Also some option about blood clots as well. The app is great overall I love it !
babykayla_123 on 5/17/2018
Flo is a very great app and really understands your body
lemonpoet on 5/17/2018
This app is a must-have for anyone with a period. The tracking is very accurate (this might take a few periods to gain accuracy of course). The articles are helpful, everything is anonymous, and you can even put a password on the app so no one else can see your information! Security and comfortability are at the forefront of this app. I highly recommend downloading this, they have an immense amount of helpful features for any stage of your life. Whether you’re twelve or forty, check this out!
Back up your data!
Kate480 on 5/17/2018
I lost over a year’s worth of data and have nothing to show my doctor since I’ve had issues. I thought it would be better than writing it down. That said, you can make a profile now associated with an email and that information will be backed. I will continue using because it’s better than the other trackers I’ve tried.
Pregnancy mode
kenn_kennnzie on 5/17/2018
It’s hardly accurate and it seems like I’m trying to get pushed to breastfeed. What if I can’t breastfeed, and you’re putting out articles saying breast is best? Thanks for making me feel like a bad mother . 👍🏻 I will be uninstalling.
Katiethegreatie695 on 5/17/2018
The app rocks! Just a suggestion maybe have an option to put in about taking a birth control pill? I know that affects my cycle but I still like to track it. Occasionally I’ve been on and off the past few years for various reasons so I’d like if maybe that would be an option :)
Love it
Jesslynn 431 on 5/17/2018
I love this app. It pretty accurate. But I wish that the days I get sick, I get to put that I’m sick. It’ll help keep me track of it. Just a suggestion
Bless this app!
rmbadol on 5/17/2018
I have been using Flo for over two years now, first on Android and now iOS. It is by far the best tracking app I've ever used. It's easy, you can record as much or as little information as you like, and for me it is incredibly accurate. The amount and types of information you can put down is extensive, and I love that you can combine it with the Health app and your Apple Watch for even more detail!! You can even have it remind you to take your birth control/other medications. If you are someone who is a bit more irregular however, I will say to air on the side of caution, and that the predictions may be off for you. It will do its best to adjust and may take several cycles - 4 or more - before it settles into better predictions. However, I find being able to look back on months (even years) of previous cycles is incredibly helpful. Thank you, Flo!
Fantastic, But...
•JRWD• on 5/16/2018
Let me just start by saying, this app is really awesome and has really helped me out a lot. I know it may seem like I’m trash talking the further you read but I promise I’m not. These are just some friendly suggestions to help an incredible app become even more helpful to the lovely women and young girls who use it. It’s going to seem like a lot but it really isn’t, I just like to explain things thoroughly. Symptoms It would be really nice if you could log more symptoms like if you were sick, had body pain (not just back pain), and/or hot/cold flashes for example. Sex and Sex Drive I think it would also be really nice if there were more options for sex and sex drive, like for example, maybe (for lack of a better term) it was banana free intimacy or a really intense make out session. I know you could just put those things in the notes section but I feel like it could make the app a lot more fun and interesting. Mood It would be really great if you were able to log more moods like motivated, confident, energetic, excited, tired, emotional, in love, etc. and maybe even options as to why you’re feeling that way. The options could be spouse, family, work, school, friends, PMS, IDK, etc. I feel like you guys have the basics down but sometimes it just doesn’t always cover it so an upgrade could help! Extras So this is something I’ve noticed with a few other apps I’ve tried that I thought could be really beneficial to this one! It would be really awesome if you could log if there was something off in the land down under. I know in the Vaginal Discharge section it has an unusual marker but that’s not exactly the most helpful thing in the world. Vaginas are complicated and have subtle signs of things being wrong so maybe if you had options for, let’s say, burning/pain when you pee, itchiness, or even a funky smell it could really help out young girls who are just starting their period adventures and don’t know that things like that are something they should keep track of and monitor as well as everything else. Exercise (A Separate Extra) Exercise is something that can greatly affect a woman’s menstrual cycle so I feel like that’s something we should be able to log to help better calculate and monitor our bodies. I honestly feel like just having a little area to check if you exercised or even what type of exercise (yoga, pilates, cardio, toning, weights, etc.) would be extremely beneficial. THIS IS AN AWESOME APP! Flo is my favorite because it’s the easiest app I’ve used and the esthetic is really pleasing to the eyes. So I want to say again, I was and am not trash talking this app. I just really believe adding in some more things would really boost this app up a thousand times more and could help it become even more beneficial to the thousands of women who use it to track their period. The only reason I didn’t give it 5 stars was because I feel like it has the potential to be more and it just leaves a little to be desired even though it’s wonderful for what it is.
Great app!
Savannah715 on 5/16/2018
The Flo app is incredibly useful. It helps me stay on track and know when my next period will be. My favorite part is being able to log which birth control pill you have taken, whether it was on time or if it was yesterday’s pill. The only thing I would really like to see in the app is a notes section. I have irregular period sometimes, which I would like to log. I believe that this would benefit myself and others when seeing our Gynecologists. Overall, this app is very useful!
Alejandra ayala1 on 5/16/2018
Fairly easy to use
My review
~itsmegirl on 5/16/2018
I love this app and I will never use another one but I would like to pick the colors of the bubbles and I would also like it if you could pick what topic your advice would be on. For example if you have a headache cramps and aches you should be able to pick that you want advice on cramps or headache. I think that you should also add in a spot where you can ask personal questions whenever needed and not just when there’s a big topic on it and you can immediately get advice instead of waiting or asking about something that you don’t really need advice on
HollyMcHenry on 5/16/2018
This app is amazing. I love it so much and it’s super duper useful. One think I would really love to see it the ability to share info about your cycle. It would make the app even more perfect!!
Amazing app
IndiWho❤️ on 5/16/2018
I love this app! It's beautifully designed, mostly accurate, and has everything I need. The reason I put for stars is because they stopped posting chat rooms. If I scroll down really far on the insights section, I can find them again, but they have given no reason to stop them coming yet. I see dozens of comments saying something about how they emailed support about it and got a really vague and unhelpful response. I decided to try and my question was just like what the others had said. Please bring back chatrooms, we get lots of great advice from other people. If you don't bring them back, please at least tell us why!
Mostly great, just a few improvements needed
SAW118 on 5/16/2018
I’ve really enjoyed this app. It’s got enough options and functions to track things without it being too busy and overwhelming like some other apps I have tried. One suggestion I think I would like is being able to incorporate nap times so I can see and account for the total amount of sleep I got in a day. And one other suggestion I’d have is to not be given the same notification of a pattern. Almost everyday I get the same notification of a body pattern. It would be nice if it gave you the notification the first time a new pattern appeared but after that it just becomes annoying. Like yes I know I get bloated the first 3 days of my cycle, why am I being reminded of that every day??? But apart from that I’m really loving the app!
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