Clue Period, Ovulation Tracker

15.1L reviews
Content rating
PEGI 3
5Cr+
Downloads
Content rating
PEGI 3
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About this app

Get to know your menstrual cycle with the award-winning period tracker app Clue. Clue accurately predicts your next period, PMS, ovulation, and fertile days based on the most up-to-date science, and helps you understand your body better with health advice from medical experts.

With Clue, your menstrual cycle and fertility will no longer be a mystery. Track more than 100 different experiences related to your cycle like cramps, hair, skin, feelings, sleep, and sex life, to see if there’s a pattern. Whether you’re trying to get pregnant, want to be more prepared for your period, or curious to learn more about your symptoms and cycle in general, Clue’s got you covered.

Founded and led by women, Clue is an all-in-one period tracker, ovulation tracker, period calendar, and pregnancy app trusted by millions of people worldwide. Clue does not sell your personal health data and will never disclose it.

What can Clue’s period, ovulation, and pregnancy tracking do for you?

PERIOD TRACKING & MENSTRUAL CYCLE APP

• Know when to expect your period and plan ahead with advanced, personalized period, ovulation, and PMS predictions
• View your menstruation, ovulation, and fertile window in a menstrual calendar and period diary
• Discover your body’s unique patterns by tracking 100+ experiences connected to your cycle like feelings, cravings, pain, sex drive, and much more
• Log your birth control method, including pills, IUD, ring, patch, and more
• Get answers to your menstrual health questions with science-based content written by medical experts
• Learn the science behind sex, fertility, getting pregnant, and irregular cycles with easy-to-understand articles

OVULATION TRACKER & FERTILITY CALCULATOR

Clue’s clinically-tested ovulation tracker technology takes the mystery out of getting pregnant and can easily tell you your ovulation, fertile days, and pregnancy chances.

• Get pregnant faster without temperature checks or pee tests
• Track your period start dates to see pregnancy chances throughout your menstrual cycle
• Get personalized fertility predictions for the best time to try or do home insemination
• Access tips and advice from fertility experts to help you understand the science behind getting pregnant

PREGNANCY APP & PREGNANCY TRACKER

• Follow your pregnancy and the growth of your baby with weekly updates on size, weight, and development
• Pregnancy calculator and due date calculator
• Track your body's changes during pregnancy, like increased smell and taste, pregnancy glow, sleep quality, the supplements you take, and more
• Receive weekly tips and support from OB-GYNs and Nurse Midwives

Get the most out of Clue with a Clue Plus subscription!

Try Clue Plus and experience the all-in-one reproductive health app for every phase of your menstrual cycle and pregnancy:
✓ Full access to science-based articles
✓ A period calendar with six upcoming cycle predictions
✓ Clue Pregnancy (pregnancy tracker)
✓ Clue Conceive (fertility and ovulation tracking)

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

Helloclue.com
support.helloclue.com

Terms of Service: helloclue.com/terms.html
Privacy Policy: helloclue.com/privacy.html

Millions of people around the world trust Clue as their period tracker, ovulation tracker, and fertility app. Start tracking your menstrual cycle and put the power of science and the support of fertility experts in your own hands.
Easily track period, ovulation, fertility, menstrual cycle, PMS & pregnancy.
Updated on
29 Oct 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Personal info, Health and fitness and 2 others
  • This app may collect these data types
    Personal info, Health and fitness and 3 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

14.8L reviews
Caroline J
5 November 2025
I use this in the most simple form, tracking just the bleeding. Yet it is surprisingly accurate with the predictions of when my period will come, even a couple of months ahead (and will quickly update predictions those rare times I'm early or late!) Updated 2025 - though I'm still using this app, I will admit the adverts for Clue Plus are genuinely driving me up the wall. You can't open the app, track anything, or even look at your cycle without ads for Clue Plus being thrown in your face 😮‍💨
123 people found this review helpful
Did you find this helpful?
Clue Period Tracker by BioWink
5 November 2025
Hi, thanks for your feedback—we get it. Pop-ups can be disruptive. We aim to always keep core features free, and Clue Plus subscriptions help cover the costs to maintain and improve the app. Relying solely on a subscription model keeps Clue independent so we can focus on our mission and not on third-party interests. Best, Ilaria - Support Team
Zoey
8 September 2026
This used to be such a useful app, but they keep locking things down so that you can only access it if you pay for their subscription offer. The latest, the insights, I can no longer see how long my previous cycles were easily. And because they want you to purchase a subscription, you are constantly offered the screen to purchase. I understand that these things require money, and aren't free to run, but it needs a balance. Maybe they should go back to basics.
2 people found this review helpful
Did you find this helpful?
Clue Period Tracker by BioWink
8 September 2026
Hi, we’re sorry to hear that we’ve let you down. To be a financially sustainable company, we’ve had to make tough decisions about which features are part of Clue Plus. You can still see your past cycle lengths by going to the Analysis Tab and scrolling down to “Your cycle history”. Ilaria from Clue
Claire Dawson
11 September 2026
The app is useful, but the ads and push notifications to sign up to a paid version are aggravating. I paid for a year last year hoping that there would be no more adverts in app but they were still there using a huge chunk of the screen. I'll stick to the free version. The paid one has a perimenopause setting but tbh it's not hugely helpful when your cycle zooms all over the place and it acts astonished that your cycle has changed. Edit for Devs: smart wearables ads are still ads. And annoying.
6 people found this review helpful
Did you find this helpful?
Clue Period Tracker by BioWink
11 September 2026
Hey, thanks for reaching out and for your feedback. If you subscribed to Clue Plus you shouldn't have seen any more subscription pop-ups, so we're sorry for the inconvenience. If you'd like to get in touch with us about this, we can try to check what happened. All the best, Ilaria - Support Team

What's new

Thanks for using Clue as your trusted cycle tracker and go-to resource for menstrual and reproductive health! We regularly update the app with new features, performance improvements, and bug fixes to enhance your experience—just like in this release.

Feel free to leave us a rating and review in the Play Store.

With <3 from Berlin, Germany
Content rating
PEGI 3
In-app purchases
Learn more

App support

About the developer
BioWink GmbH
android@helloclue.com
Adalbertstr. 7-8 10999 Berlin Germany
+49 160 96717689
EU medical device information
Clue (Android) (SRN: DE-MF-000030007)
BioWink GmbH
Adalbertstrasse 7-8, 10999 Berlin, Germany
UDI-DI: (01)04260749840046

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