Clue is the #1 women-led period and cycle tracker for understanding your body and how hormones shape your everyday experiences. Loved and trusted by over 100 million women and people with cycles worldwide, Clue supports confident, informed decisions about your health.
Whether you’re tracking your period, trying to conceive, navigating perimenopause or simply getting to know your body better, Clue’s got you covered.
Backed by science and headquartered in Berlin, your data with Clue is protected by some of the strictest data privacy laws in the world (GDPR).
New: Connect your wearable with Clue. Combine Clue Plus insights with your temperature trends, sleep, and heart rate biometrics to better understand your fertility and health.
PERIOD & MENSTRUAL CYCLE TRACKING
• Know when to expect your period and plan ahead with advanced, personalized predictions
• Discover your body’s unique patterns by tracking 100+ experiences connected to your cycle like feelings, PMS, cravings, pain, sex drive, and much more
• Review an analysis of your past periods and cycles, including average cycle length, period length, period flow, and cycle variation
• Log your birth control method, including pills, IUD, ring, patch, and more
• Set up calendar reminders for your period
• Sync your period data with Apple Health
• Get answers to your health questions with science-based content that breaks down complicated topics like fertility, STIs, and the science of sex into easy-to-understand articles
FERTILITY & OVULATION CALCULATOR
Clue’s clinically-tested technology takes the mystery out of getting pregnant and can easily tell you your most fertile days.
• Get personalized ovulation and 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 TRACKING
• Follow the growth of your baby with weekly updates on size, weight, and development
• 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
PERIMENOPAUSE
• Track hot flashes, sleep changes, your mood, and more
• Stay on top of your changing cycle
• Learn how your body is changing with expert-led articles
Get the most out of Clue, plus access to all four tracking modes (like Clue Conceive and Clue Pregnancy), with a Clue Plus subscription!
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
I’ve been using Clue since 2016 and never faced any problems, but i absolutely hate the latest update. Before the update, there was a comments section where i had saved very important details about my cycle and they are GONE after the new update. You can’t just remove my data like that! I need that information back. Also, i can’t seem to find my profile info in the new update! No name, e-mail, back up info, nothing! Please bring back the old Clue!
Developer Response
Hey, thanks for reaching out. We’re happy to let you know that the Tags are now back in the Clue app. This also includes any data you’ve previously tracked in this category. Make sure you’ve updated your app to the latest version to see it. We'll also bring the Profile page back. Thanks for your patience and for sticking with us, Ilaria from Clue.
Have been using it for almost 10 months now
1alia2
Definitely recommend it to every girl and specially girls who are just starting up their menstrual cycle journey. Very, very helpful to have on your phone.I just fill the day info every night and it saves me at doctors appointments, predicting first day of period (sometimes surprisingly accurate predictions) and knowing how I usually feel during my periods.
Unable to sign in
Sara Azi
I really loved the app and didn’t use any other one. Been using it since 2016 (i think). But the past month or so it suddenly logged me out, and whenever I try to sign in again, it keeps saying that there is an “unexpected error” and that I should try again later. Been trying again ever since, still gives me the same prompt. I also tried to create another account, but the same error message pops up. I really don’t want to change my period tracker app, but it’s really unfortunate that Clue stopped working for me. I hope it gets fixed so I can use it again
Developer Response
Hello, thanks for your review. We're sorry about this “unexpected error” issue. If you're using mobile data on your device, please try to switch to wi-fi, and it should work again. All the best, Ilaria from Clue.
Nice app to keep track of your period
PlauraP
Very nice app but it would be important to have the dates of the ovulations. Perhaps it is available in the paid version. I usually dont mind to pay for good app but I am already « giving away » a lot of precious data about my periods, as many other women are doing...
Developer Response
Hello! Thank you for your feedback. But the app already has ovulation predictions! Please send us an email at support+ios@helloclue.com so we can help you into it. Cheers, Ilaria
New: Sync wearable data with Clue to start the new year with deeper cycle insights.
Connect a device to see biometric data like temperature trends, sleep, and heart rate alongside your cycle.
You’ll build a clearer picture of how your body changes over time:
• View temperature charts to easily see peaks around ovulation
• Track sleep quality across different cycle phases
• Explore connections between hormonal shifts and heart rate
Clue is now compatible with more wearables than ever, including Oura, Fitbit, WHOOP, Ultrahuman, Polar, Withings, Luna, and more. Available metrics depend on the device you connect.
Available with Clue Plus. New year, deeper insights – subscribe to unlock a fuller picture of your health this year.
Version 252.0
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 based, for example, on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More