Clue Period & Cycle Tracker

Clue is the science-based period tracker, cycle tracker, and pregnancy app that helps you understand what’s going on in your body—so you can track, plan, and live in sync with your cycle.

Whether you’re trying to get pregnant, managing symptoms, navigating menopause, or simply curious about your body, Clue supports every phase of your cycle. Track what matters to you and discover how your cycle affects your daily routine, body, and mind—with personalized insights, a smart menstrual calendar, charts, reminders, and more. Clue is more than a period diary: it’s a trusted fertility tracker, pregnancy app, and cycle companion—backed by science and designed to help you feel your best.

✅ Trusted by 10+ million users worldwide

👩‍🔬 Female-led & science-based period tracker

🔒 Your health data is kept safe within the EU, and is never sold or shared

Why Clue is your go-to period tracker and cycle tracker:

1. Plan smarter: Predict periods, ovulation, and your fertile window to plan with your menstrual cycle in mind, or to get pregnant if you're trying to conceive

2. Track what matters: Log 200+ cycle-related symptoms and manage birth control pill use in one place

3. Make informed choices: Understand your body with science-based insights on your period tracking, pregnancy, fertility, and overall health

PERIOD TRACKER & MENSTRUAL CYCLE TRACKER

Go beyond adding period dates to a menstrual calendar—track PMS, ovulation pain, birth control, and more to connect the dots between your symptoms and your cycle. Clue is a trusted period calendar app and irregular period tracker that helps you spot patterns in mood, skin, energy, and sleep, with personalized insights you can use to support your own well-being or share with your OB/GYN. Plus, set period and pill reminders

FERTILITY TRACKER & OVULATION CALCULATOR

Trying to conceive? Clue’s fertility tracker helps you pinpoint your fertile window with precise ovulation and period tracking, along with daily menstrual cycle and fertility predictions, no temperature checks needed. Log ovulation and pregnancy tests, and identify your most fertile days to increase your chances of getting pregnant.

PREGNANCY APP WITH WEEKLY HIGHLIGHTS

Track your pregnancy week by week and feel more in tune with what’s happening in your body. Use the due date calculator, follow your baby’s development milestones, log pregnancy experiences, and get guidance written by Certified Nurse Midwives—all in one trusted app for pregnancy, periods, and everything in between. Switch from pregnancy back to period tracker mode after postpartum once your cycles resume.

MENOPAUSE & PERIMENOPAUSE TRACKER

Track hot flashes and other symptoms related to perimenopause and menopause. Learn what to expect, including changes to your period, and get support through science-backed health articles.

Get Clue Plus to unlock the full power of the Clue period and fertility tracker—including advanced cycle and ovulation predictions, all-in access to Clue’s content, and tools for pregnancy, perimenopause, and more. Subscribe for deeper period tracking insights into every phase of your cycle.

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Note: Clue Cycle Period Tracker should not be used as a contraceptive.

Looking for a smart, science-backed period tracker, pregnancy app, and cycle tracker you can trust? Try Clue!