Understand your body. Plan around your cycle. Know what’s coming next.
Clue is the #1 women-led period and cycle tracker – science-backed, privacy-first, and built to help you live in sync with your cycle.
Trusted by millions of people worldwide, Clue gives you the knowledge and personalized insight to make confident health decisions, from first period to perimenopause.
Headquartered in Berlin, your data is protected by strict European privacy law (GDPR).
Track your period and cycle
Know when your period is coming, and get personalized predictions based on your unique cycle length, flow, and patterns.
See how your cycle affects how you feel
Track 200+ symptoms and experiences – cramps, PMS, pain, energy, cravings, mood, skin, sleep, sex drive, discharge, and more. Your patterns, in clear charts.
Get ahead of symptoms
See what might be coming, from PMS and cramps to energy dips, so you can plan ahead. Set custom reminders so nothing catches you off guard.
Understand your fertility
Get personalized ovulation and fertile window predictions, based on a clinically-validated algorithm designed to help you conceive.
Stay on track with birth control
Log your method – pill, IUDs, ring, patch, and more. Track your cycle symptoms even without regular bleeding.
Get real answers, backed by science
Explore 400+ articles on your cycle, fertility, sex, pregnancy, perimenopause, and reproductive health.
Use Clue through every life stage
Switch between modes as your needs change. Period tracking, trying to conceive, pregnancy, and perimenopause.
Connect a wearable
Layer your cycle data with temperature, sleep, and heart rate for deeper health insights. Works with Apple Watch, Oura, WHOOP, Withings, Fitbit, and more.
Get more from every cycle with Clue Plus — deeper analysis, advanced predictions, and personalized insights that get smarter the more you track.
A few legal details:
After you choose the Clue subscription that’s right for you & confirm your purchase, the credit card associated with your iTunes Account will be charged. Once purchased, your subscription will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. If you currently have a free trial, any unused time will be forfeited when you purchase a subscription.
If you want to renew your subscription, your account will be charged the same amount you paid for your initial subscription, 24 hours before the end of the current period. You can manage or change your subscription at any time, including turning off auto-renewal, by going to the ‘Account Settings’ on your device after the purchase.
Note: Clue should not be used as a contraceptive. Clue is made to help people understand their menstrual and reproductive health by tracking their data, as well as predicting fertile days to aid conception. The app does not substitute professional medical advice, diagnosis, or treatment. Your healthcare provider can give you advice on your specific needs and situation.
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Terms of Service: www.helloclue.com/terms
Privacy Policy: www.helloclue.com/privacy
It helps detect when the period will be approx. and with unprotected days when missed a pill
Great App
Juleigh15
Super useful and informative!
THEY ONLY WANT YOUR MONEY AND DATA
Jessica likes to run, you know
This app keeps getting worse and worse as the years go on. They keep taking away features in hopes that you will purchase their “plus” addition to get those features back. They even took away the fertile window period on the calendar- like this free edition literally has no features left!! What a joke.
Developer Response
Hello, and thank you for the feedback. We want Clue to be a sustainable app thanks to our users. We don't want to show ads, nor sell your data: we want to create a real value in your lives. And the best way to do that was to include some features under Clue Plus. Regarding the fertile window, if you are using Clue to get pregnant or for educational purposes you will still be able to see the predicted ovulation! Meanwhile, remember that fertile window and ovulation should not be used for contraception. We'll be have to clarify if you have any questions - feel free to reach out to us!The fertile window as it is right now puts fertility at the center of the Clue experience. Whether or not fertility is part of your life right now, we want to acknowledge and educate a wider audience, which is why we are removing the fertile window. This is to refocus the information more on you and less on your fertility.
Was a 5, now a 1
KCAT1988
I absolutely hate they’ve removed the estimated ovulation/fertile window. That was a critical point in the success of my family planning. Now that the feature is gone, I’m gonna switch to a different app. Thanks for all the years, Clue.
Developer Response
Hi! You can still turn the ovulation day on by going to the More menu > Settings > and toggling the potential ovulation day on.Your body is not a clock, and you will not always ovulate at the same time each cycle. The ovulation day shown in Clue is only a prediction and varies depending on your body and environment. The ovulation day is meant for educational purposes only and CANNOT be used as a contraceptive.We still love and support our users who are trying to get pregnant! If you DO want to use Clue to get pregnant, we have an article on our website giving tips on how to get pregnant :) and if you have any questions, please feel free to reach out to us!
We update the Clue app every week with bug fixes, performance improvements, and new features to make your cycle tracking more accurate and comprehensive.
If you have questions or feedback for the team, browse our FAQs or contact us anytime through the contact form in the Support Section of the app (More Menu, Support).
Enjoying the Clue app? Feel free to leave us an App Store rating and review.
Version 279.0
The developer, BioWink GmbH, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
Health & Fitness
Location
Contact Info
User Content
Identifiers
Usage Data
Sensitive Info
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
