Hello Clue

Know your body like never before with the period tracker and ovulation calculator you can trust. Clue is the #1 women-led period and cycle tracker created by women to transform menstrual cycle tracking into a deep understanding of your hormones and reproductive health. Clue helps you make sense of your menstrual cycle at every life stage – track your period, fertility, ovulation, and pregnancy with the cycle tracker backed by science and protected by strict EU data privacy law. Explore 300+ expert-written guides on menstrual cycles, fertility, pregnancy and more, all inside the app. The more you track, the more you know. Women-led, science-based, privacy-first period tracker 🔒 Free period tracker with calendar view to plan with confidence • See when your period is coming with Clue's period calendar. • Use Clue as an ovulation calculator to follow your fertile days. • Track your period alongside over 200 factors like mood, energy, sleep, and sex drive to see how they relate to your menstrual cycle. • Spot patterns in your menstrual cycle regularity and period flow. • Get birth control pill reminders and notifications when your period is due. • Get alerts when you enter a new menstrual cycle phase. • Clue works as a period tracker for teens and anyone wanting body literacy at any stage. Ovulation calculator and fertility tracker for trying to get pregnant • Clue's ovulation tracker predicts your fertile window with a clinically validated algorithm – no ovulation strips, no guesswork. • Get daily fertility insights for trying to get pregnant. • Add basal body temperature (BBT) to pinpoint ovulation with more accuracy. • Turn your cycle tracker app into a powerful ovulation calculator and tool for trying to get pregnant. Track your pregnancy week-by-week with expert guidance • Clue's pregnancy tracker guides you through every stage of pregnancy with advice from certified Nurse Midwives. • Monitor pregnancy symptoms, milestones, and body changes with personalized insights. • Use Clue before, during, and after pregnancy as your complete pregnancy tracker. Never miss birth control with smart pill reminders • Set birth control pill reminders for all kinds of contraception – Clue works as your birth control tracker. • Track how birth control affects your mood, energy, skin, and symptoms throughout your menstrual cycle. Understand irregular periods, perimenopause and health conditions • Clue works as an irregular period tracker, giving you predictions even with irregularities. • Use Clue as an endometriosis or PCOS tracker to monitor symptoms and build a personalized health record. • Perimenopause tracker helps you navigate hormonal shifts and changing cycles. • Use Clue as a hormone tracker to understand how fluctuations affect mood, skin, and overall health. Connect a wearable for deeper fertility and cycle tracking • Sync Oura, WHOOP, FitBit and more to automatically track sleep, temperature, and heart rate. • Use Clue Cycle & Period Tracker and your wearable as a basal body temperature tracker and heart rate tracker. • See how wearable data relates to your menstrual cycle and ovulation for a fuller picture of your health. Note: Clue period tracker and ovulation tracker should not be used as a form of contraception. Visit support.helloclue.com for help and resources. Join over 100M people using Clue – download Clue to start tracking your period and cycle today. 📲 Subscribe to Clue Plus for deeper insights, advanced ovulation tracking, pregnancy support, and perimenopause tools.

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. Helloclue.com support.helloclue.com Terms of Service: www.helloclue.com/terms Privacy Policy: www.helloclue.com/privacy