Track your period, discover patterns in your cycle, and learn how your body works – with Clue.

Clue is more than just a period tracker. The app uses science and data to help you learn how your menstrual cycle affects your mind and body. With Clue, you get period, ovulation and PMS predictions you can trust, detailed insights into how factors such as skin, stress and energy levels can change throughout your cycle, and a science-backed reproductive health encyclopedia at your fingertips. You can also set customizable reminders so you are always prepared for what’s coming. Backed by science, driven by ethics, and female-led, Clue never has and never will, sell user data.

Regardless of your life stage, Clue’s got your back. From period to pregnancy tracking, whether you want to set reminders to take birth control or get ovulation day notifications, or just want to discover your body’s unique patterns, Clue is designed to help you stay informed and make empowered health choices.

** App of the Day Worldwide ** — Apple
** Best Fertility Apps 2020 ** — Healthline
** Top free period tracker app ** — Obstetrics & Gynecology Journal (ACOG)


• Period, ovulation, and PMS predictions for your next three cycles
• Track your period days, flow intensity, menstrual products, or birth control method
• Log 30+ symptoms, cravings, moods, energy levels, exercise, and more to discover patterns in your cycle. The more you track, the smarter Clue gets!
• Set up calendar reminders for your period, PMS, ovulation, or birth control pill
• Keep tabs on your cycle lengths and variations to observe trends and maximize doctor visits
• Ovulation and fertility tracking: log your BBT, cervical fluid, and ovulation tests to boost your fertility predictions
• Pregnancy tracking: Log your pregnancy and postpartum symptoms, and track fetal development week by week with guided content
• Learn about your cycle with educational articles and menstrual health topics curated by Clue's in-house science team
• Track with an intuitive, gender-inclusive app designed for anyone who menstruates
• Integrate with Healthkit, including Health App, Touch ID, and Today Extension

The unsung benefits of using Clue:

• Become the expert on your body
• Be kinder to yourself when your cycle symptoms get you down
• Get curious about how sex drive & your cycle relate
• Gain a deeper understanding of how your body and mind are connected

Loving Clue? Then you’ll love subscribing to Clue Plus! Understand your body even better with these Clue Plus features:

- 6 months of upcoming cycle predictions
- In-depth analysis of your cycle patterns
- Monthly email with your cycle statistics
- Full access to Clue's content tab
- Pregnancy tracking mode

After you choose one of our plans and confirm your purchase, the payment will be charged to your credit card through your iTunes Account. Once purchased, subscriptions will automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period.

If you decide to renew your subscription, your account will be charged the same amount you paid for your initial subscription within 24-hours prior to the end of the current period. At any time you can manage your subscription and turn off auto-renewal by going to the Account Settings on your device after the purchase.

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

If you run into any trouble, the support team is here to help! Please reach us through the app so we can assist you more effectively. Tap:
1. More Menu
2. Support
Or – directly through the form:
Twitter: @clue
Instagram: @clueapp
TikTok: @clueapp

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What’s New

Version 44.0

Clue is not just a period tracking app. It has many tracking options for every part of your life, from cramps to energy levels. Tracking our everyday experiences is not just useful for learning about how our bodies change during our cycle, but can also be helpful for showing a healthcare provider if you notice a change that isn't typical for you.

People using Clue have reported that tracking their experiences has helped them identify when to expect PMS or how their emotions fluctuate during their cycle. You can customize your tracking by choosing the health categories you wish to include, and we also give you the option of making your own tags to track anything you want.

This update includes bug fixes and performance enhancements. If you're enjoying the app, feel free to leave us a rating and review.

Ratings and Reviews

4.7 out of 5
34.4K Ratings

34.4K Ratings

Laurin4475 ,

Such a great period tracker

I started using Clue when I had to go off the pill, and was trying to predict when my period would arrive. It made it much easier to see what was happening, and helped me understand my body better. It was an invaluable resource for tracking my fertility when we were trying to conceive, and I missed being able to use it when I was pregnant!
I would recommend this app above all other period trackers.
If there was one improvement that I wish you could make, it would be to implement pregnancy into the app. Even just to be able to tell the app you’re pregnant, so it doesn’t expect you to input data about period for a number of months would be great. Although it is good that when I’ve opened it up after 11 months that it understands that that time wasn’t one long cycle. It would be great to be able to input that you’re breastfeeding, and be able to use information such as birth date etc, so the app knows to expect various different symptoms (and probably not a regular cycle) for a time afterwards.

Shadow6Meg ,

Good but for me it desperately needs a journal

This app is really simple to use and has a great visual circle to show where abouts you are in your cycle which is nice.

It also has a nice information helper as well with pictures you can click on to track how you’re feeling, if you felt like eating or if you slept a lot etc. on one hand I like this because it helps keeps things uniform and easy to track and on the other hand I can’t stand it because it keeps things too uniform and there is no where to add extra details if something else is effecting your health. For example I might be sick this week or I might be more tired then usual due to work picking up or being more active then normal. I think it would be really nice if there was a way to write down extra details like that. Perhaps you could make it so people originally write the journal entry in the regular symptoms detail entering place then it shows up in the calendar with all the rest. Perhaps have the journal entries primarily show up in the zoomed in one column, daily calendar page. Perhaps have the first sentence or a few sentences of the journal entry be visible under the symptoms to keep it compact but with the ability to click on them to view/create larger journal entries.

Overall I really like some aspects of the app but I feel like the inability for the user to add detailed information could really hurt it. It’s something that has made me consider changing apps quite a few times.

lowcals ,

The best tracking app I’ve found

This app is incredible compared to basic calendars and calculator apps that I have used in the past. It’s motivated me to get into a routine and pay more attention to my health. The reason I didn’t give it 5 stars is because I would like there to be a few more options in each category (or the ability to add options per category). For emotions you can only select; happy, sad, sensitive or PMS. I want to be able to add things like; flat, irritable, excited, hopeful, moody etc. I’m rarely just happy or sad. Same goes with energy levels; an option for a neutral level of energy would be great. I have endometriosis so this app is fantastic because I’ve always been interested to gauge the different phases of my cycle in more detail. Providing some extra information and symptoms for those with endometriosis or PCOS would be wonderful too (for now I have added some customised symptoms). I’d also love LOVE if there was notes about the phases of the moon as these generally have massive correlations with our cycles and it’s super interesting to gauge and learn more about. Great job with this app. I’m looking forward to using it more and hopefully seeing some addditional functions in the future! :) thank you!!


Clue Period Tracker - 1 year
Discover more patterns in recurrent symptoms.
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App Privacy

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, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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