Clue Period & Cycle Tracker

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 s