The Clue app accurately predicts your period, helps you understand your symptoms, and can be used as a reliable ovulation app, menstrual calendar, fertility tracker, birth control pill reminder, and menstrual cycle tracker complete with your period history.

We’re not only backed by science; we’ve got period tracking down to a science. Track your menstrual cycle with Clue to learn more about your body, mind, and self.

** The recommended period and fertility tracking app by Healthline, The Cut, and Obstetrics & Gynecology, a publication of the American College of Obstetricians and Gynecologists (ACOG) **

Period & Cycle Tracking:

+ Get accurate period predictions for your next three cycles
+ Track your period days, flow, menstrual products or birth control method
+ Log your symptoms – like PMS and cramps – so you know when to expect them again
+ 30+ tracking categories to paint a holistic picture of your health in relation to your cycle
+ Easily set up calendar reminders for your period, PMS, ovulation, birth control pill or more
+ Cycle analysis to view your cycle lengths and period history
+ Health insights that can explain your cycle and help identify regularities and irregularities
+ Integration with Healthkit, including Health App, Touch ID, and Today Extension

Fertility & Ovulation Tracking:

+ Log your Body Basal Temperature (BBT) to help estimate ovulation
+ Set up reminders for upcoming fertile days and ovulation predictions

** If you love Clue, you’ll love subscribing to Clue Plus! Your subscription: **

+ Keeps the app and content free for anyone who can’t pay
+ Proves that people care about data privacy—and are willing to support companies that keep data private
+ Contributes to Clue-funded menstrual health research

After you choose one of our plans and confirm your purchase, the payment will be charged to your credit card through your iTunes Account. Once purchased, subscriptions will automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period.

If you decide to renew your subscription, your account will be charged the same amount you paid for your initial subscription within 24-hours prior to the end of the current period. At any time you can manage your subscription and turn off auto-renewal by going to the Account Settings on your device after the purchase.

Note: Clue should *not* be used as a contraceptive.

Get answers to your questions about periods, sex, and menstrual health at

Twitter: @clue
Instagram: @clueapp

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Privacy Policy:

What’s New

Version 13.0

We just released an important new health insight that can help you identify symptoms of perimenopause, a.k.a. the transition into menopause.

You might see this insight in your app if you are over 45 and have tracked cycles that are shorter than what’s normal for you. Tracking other symptoms related to perimenopause like heavier periods, hot flashes, or changes in mood, could help you determine whether or not you are starting this new stage of life.

If you’re enjoying the app, feel free to leave us a rating and review! You can also send your praise, feedback, and questions to

Ratings and Reviews

4.8 out of 5
437 Ratings

437 Ratings

sintei ,

Accurate and user friendly

I have now used clue for over two years and I must say it’s been very accurate. If you feed the correct information, your predictions are on point and makes it easier for a woman to plan herself. Clue has been my very own PA when it comes to my reproductive health. Thank you.

Amylove84 ,

Best ever and very accurate

It’s a beautiful app and if you give it correct data of when you start your periods and when you finish, it will exactly predict the next ones. It doesn’t really work for the irregulars though which i believe most apps are the same🤪

manne0413 ,

Clueeee review

Most reliable app I’ve ever used and if u think it’s not working for you your most likely at fault as you perhaps didn’t update every time you had your periods it’s so reliable


BioWink GmbH
139.9 MB

Requires iOS 11.0 and watchOS 4.0 or later. Compatible with iPhone, iPad and iPod touch.


English, Danish, French, German, Hindi, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish

Age Rating
Infrequent/Mild Mature/Suggestive Themes
Infrequent/Mild Medical/Treatment Information
In-App Purchases
  1. 12 Months USD 9.99
  2. 1 Month USD 0.99
  3. 1 Month USD 9.49


  • Family Sharing

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

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