Glow is the world’s best ovulation app and fertility tracker. Glow's menstrual and ovulation calculator helps women learn about their fertility, whether avoiding or attempting pregnancy. Glow is also a period tracker that records your mood, symptoms, sex, and medications; it also predicts your fertility and assists those undergoing fertility treatments like IVF or IUI.

Winner of 2014 Webby for best Health & Fitness app, Glow is an elegant, data-driven ovulation calculator & fertility tracker designed to help you take control of your reproductive health.

+ Innovative ovulation calculator and fertility charts, powered by sophisticated data analysis.
+ Forecast your ovulation and upcoming period with period tracker predictions that get smarter over time.
+ Community and partner support, not found on other ovulation calculators.
+ Personalized reproductive health and fertility insights based on your ovulation, period timing, and menstrual cycle.
+ Reminders about medications, and other contraception.

+ Email yourself a PDF of your ovulation results and other health data.
+ Sync your health profile (including fertility data and ovulation days) to the cloud.
+ Integrate key fertility data with Apple's Health app.
+ Sync with other health apps such as Jawbone, MyFitnessPal.
+ Fertility treatment support for IVF or IUI patients.
+ Partnership with leading fertility clinics such as Boston IVF, Shady Grove Fertility and RMA NY.
+ More than an ovulation calculator—the only period tracking and fertility companion that focuses on overall women’s health.

+ Daily health log helps you record over 40 different health signals, including BBT, cervical mucus, ovulation calculator and more.
+ Set medication, ovulation, contraception, and period tracker reminders.
+ Make charts of your menstrual, ovulation, and fertility data.
+ Review past periods, menstrual cycles and ovulation dates to better understand fertility.
+ Five-day and monthly calendar views on period tracker show next fertile window, ovulation day, upcoming period.

+ Get support from the vibrant Glow Community, unmatched by other ovulation calculators.
+ Continue journey on Glow Nurture, Glow’s Pregnancy app.
+ Mirror app for your partner--because fertility's a team sport!

Glow First is for those wanting to have a baby as soon as possible. If you choose to join and don’t get pregnant, you will receive funds to help cover the cost of your infertility screening.

Glow is free to download and use. Should you choose to upgrade to Glow Premium, you will unlock the following features:
- Comparative Insights: "Is this normal?" Compare with millions of women
- Premium Articles - Next level fertility facts
- Private messaging: Find friends . Glow together.
- Custom profile: Stand out from the rest.
- Premium support: Jump the queue!

$7.99 for month-to-month
$3.99/month for 1 year
$59.99 for lifetime
(subscription works across all Glow company apps!)

Payment will be charged to your credit card through your iTunes account at confirmation of purchase. Subscription renews automatically unless cancelled at least 24 hours prior to the end of the subscription period. There is no increase in price when renewing.

Subscriptions can be managed and auto-renew turned off in Account Settings in iTunes after purchase. Once purchased, refunds will not be provided for any unused portion of the term.

For full Privacy Policy and our Terms of Service:

Web -
Facebook -
Twitter - @GlowHQ
Instagram - @GlowHQ
Pinterest - @GlowHQ

If you are having technical issues or have any questions about your cycle or period, we're here to help. Please send us an email to:

What's New

Version 7.0.1

Glow's latest update has a feature you never knew you desperately needed: A smart ovulation strip scan powered by machine learning! No longer do you have to squint over your OPK strip, trying with futility to determine if the second line is as strong as the first. Glow now takes all the guesswork out of it - making OPKs 100% easier to use - and thus, more effective. Additionally, Glow is now the first and only fertility app that supports conception after a miscarriage and adjusts its algorithms accordingly. And finally, while making all the other changes, we spruced up the look and feel of Glow a little bit (ok, a lot). Download now. Don't miss out.

Ratings and Reviews

4.7 out of 5

17.7K Ratings

17.7K Ratings

Ok for tracking, but community too x rated for young users


This app is ok for tracking your period and/or ovulation, but it’s not great. It seems to be pretty accurate, but not spot on if your in need of something super accurate. The community can be good for adult users who can let rude comments roll off their backs. The community can be helpful and informative for some. Some young users may find help in the community that they may not find in other places, if they don’t have a woman in their lives that they can talk to or good education on female reproductive system or sex.
However, I would warn any parents considering this app their teen or pre-teen, the community can be too x rated and rude for young users. This warning also applies to the Eve app, from the same company, which uses the same community.
Developer’s response may say their apps are rated 17+ for this reason, but at least on my phone for the App Store it shows a rating of 12+, and to me that is a pretty big difference when we’re talking about teens. Maybe I should add that as of this writing the rating was 12+. That could change later.

Developer Response

Thank you for this feedback. Our apps are generally rated 17+ for just that reason, although it's possible to edit what content you see by changing your group subscriptions.


The Glow Community Team

Pretty good up until lately


I have been using the app for about 7 months. We have been trying to have a baby and I can never keep up when I last had my period unless I look at my BC pack. Obviously, now that I’m off of them I needed something to help track it as well as ovulation. It’s been pretty good with some exceptions but I think that is mainly because of some issues I’m having and not because of the app. I have found some great support and advice among the members. It’s also just nice to have a place to go and join specific groups that are similar to your situation or interests. That has been a very positive experience. Women lifting people up. The last few days the app hasn’t been able to open. I’m not sure if it has something to do with the latest update but I have never had this issue until this week. I hope it gets fixed ASAP because I have really come to rely on this app for logging all of my information.

Disappointed: Better apps out there for tracking while TTC


Daily chance of pregnancy % is great, but all the adds, app interface and Glow community are why I will delete it!
I have been using another app for the past 5 months while TTC, which I love it, but I wanted to add another app to my arsenal to see if I’d receive any different insights or tracking data as to when my peak was or tips for what is best for your body pre-pregnancy. The only thing I like about Glow is that it gives you daily percentages of your chance of pregnancy. So during your peak fertility that’s great to see. But then there are the ads, and daily polls that don’t give me any incentive to stay in app. As for the community...I’m all for the General TTC or Glow announcements. It is so cute to see the women excited that they’ve conceived! But people posting photos of themselves in lingerie asking for opinions or asking how to remove nail polish..makes it seem like Facebook. Lastly the app itself is very busy and confusing to navigate at first. I doubt the premium version makes anything better aside for a bit more info.

Developer Response

Thank you for this critical feedback. It's nice to hear there were features of Glow that you enjoyed. Although we know we aren't perfect, we are always trying to improve and grow as a company. Please feel free to reach out to us at if you'd like to share any other feedback.

Glow Support Team


Go Glow Period, Fertility Pro

Advanced tools to pinpoint your ovulation day



Glow, Inc.
131 MB
Health & Fitness
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 12+ for the following:
Infrequent/Mild Medical/Treatment Information
© 2017 Glow, Inc.
In-App Purchases
  1. Glow Premium $47.99
  2. Go Glow Period, Fertility Pro $7.99
  3. Glow Lifetime Premium $59.99


  • Family Sharing

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

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