Opening the iTunes Store.If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To download the free app Clue: Period, PMS, fertility & ovulation tracker by BioWink GmbH, get iTunes now.

Already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Clue: Period, PMS, fertility & ovulation tracker

By BioWink GmbH

Open iTunes to buy and download apps.


Clue is a female health app that uses science and data to help you discover the unique patterns in your cycle. It reminds you about your period, PMS and fertile window.

Clue is rated as the top free menstrual tracking app by the journal Obstetrics & Gynecology, a publication of the American College of Obstetricians and Gynecologists (ACOG).

**Now optimized for iOS 10**


Use Clue to:
+ Know when your next period is coming.
+ Get reminders before your next period, PMS and fertile window - both on your iOS device and on Apple Watch.
+ Discover the unique patterns of your cycle.
+ Track sex, pain, moods, cervical fluid, birth control pills and more.
+ Connect with partners, friends and family to open up the conversation about menstrual health.

Clue also includes:
+ The guarantee of no flowers, butterflies, euphemisms or pink - ever.
+ In-depth information about the menstrual cycle, complete with medical and scientific references.
+ 31 tracking categories, including period, cramps, emotions, skin, hair, sleep, exercise, energy, cravings and more.
+ Analysis of your current and past cycles, along with an overall average, to easily observe trends.
+ The fastest data entry of any period tracker.
+ An algorithm that learns from the data YOU input. The more you use it, the smarter it gets.
+ A customizable passcode to protect your privacy.
+ An optional account login to backup your data or log in across multiple devices.
+ Enhanced iOS features, including reproductive health integration with the Health app, Touch ID and Today Extensions.

Recommended by Buzzfeed, The New York Times, Wired, TechCrunch, The Daily Mail, VentureBeat, and many more.

**What people say about Clue – Period Tracker**

“Clue is perfect. With other apps, I quickly got tired of spending 5 minutes each day inputting my information. It only takes 30 seconds with Clue. “

“This is exactly what I wanted - a straight-forward app that doesn't look like pink flowers and sunshine threw up all over it.”

“I've tried nearly a dozen period tracking apps and this one is in a league of its own. Pioneered by a woman who sought to empower other women. Success!”

Please note: Clue – Period Tracker is not a contraceptive.

**Please say hello**
We love hearing from Clue users. Send your feedback, questions and suggestions to

**Want more Clue?**
Our blog:

What's New in Version 3.3

Connect Fitbit with Clue to discover the unique patterns in your cycle.

**iMessage Sticker Pack**
Add your favorite Clue icons into iMessage conversations.

Find answers to the most frequently asked questions about Clue.

Customer Reviews

THE BEST period tracker for a self-aware, adult woman!

I've tried most of the other period apps out there. Some of them are okay, but most are really girly, fertility-focused, or require a ridiculously expensive subscription. Clue is totally different, and I love it!

FYI, I have very painful periods (possibly endometriosis) and I don't want kids. With Clue, I don't get a bunch of ridiculous information about fertility tracking or how to give blowjobs. (Looking at you, Eve and Glow...) Instead, Clue gives me information about real period issues, complete with medical sources! There are so many different things I can track, and if there's something they don't have, I can add a custom tag for it.

I would love to make some suggestions though: the ability to keep a written log would be indispensable! Also, I'd like to see more options for emotional tracking, specifically anger, irritability, and anxiety. Other than that, I think this is the perfect period tracker for a self-aware, adult woman who wants to chart her PMS and period symptoms.

Ridiculously helpful

You can enter in multiple kinds of categories that are separate that are not just period-related. Every category is explained with easy-to-follow and accurate health information. The company is very friendly in sending useful emails and the design is simple and gender neutral (!!!!).
You have the option to share your cycle with other people. However, I wish this part was expanded more so that the viewer can see different details besides your cycle (e.g. They can see your mood patterns). I also wish there was some kind of customization to the categories if you are familiar with the patterns that you fall under/you want to track something that is not offered.
Overall, it's a huge benefit to track your period and this app does it in an organized and informative way.

Use it all the time!

Though, some may complain about the extra features of what you do daily or have problems with the format, it's my cup of tea! I love the extra features (like updating about the status of your skin or the meditation timer, etc) and how I can customize to my liking of what I want to focus on to better understand my body. I use it and update the status of my activity daily to my liking or just keep it blank if things were the same as the day before. I recommend this app to any woman. The format is easy and simple! (At least for me! It does take a while in the beginning to add or take away things, but you get used to it!)

Clue: Period, PMS, fertility & ovulation tracker
View in iTunes
Offers iMessage App for iOS
Offers Apple Watch App for iPhone
  • Free
  • Category: Health & Fitness
  • Updated:
  • Version: 3.3
  • Size: 87.0 MB
  • Apple Watch: Yes
  • Languages: English, Danish, French, German, Hindi, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
  • Seller:
Rated 12+ for the following:
  • Infrequent/Mild Medical/Treatment Information
  • Infrequent/Mild Mature/Suggestive Themes

Compatibility: Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions: