**Rated the top free period and ovulation tracker app by the journal Obstetrics & Gynecology, a publication of the American College of Obstetricians and Gynecologists (ACOG).**

Clue is the only period tracker app that uses science to help you discover the unique patterns in your menstrual cycle. Track your period and health cycles along with millions of people for accurate information. Get personalized reminders about your period, PMS, ovulation, and fertility.

With Clue, your health will no longer be a mystery. Track and monitor your period and health trends with multiple mood trackers, exercise trackers, and health logs. Clue learns from you how you really are.

It’s quick and easy to track your period, PMS, and general health with Clue.

Period Tracking:
+ Track your period, flow heaviness, and the menstrual products you used.
+ Receive accurate predictions and calendar reminders before your next period, PMS, and ovulation.
+ Record even more with your health. Track sex, pain, moods, cervical fluid, and more.
+ Track and predict periods with our calendar. Easily view past periods, PMS, and fertility data, as well as upcoming predictions for your next three cycles.

Scientific Information:
+ Read in-depth information about the menstrual cycle, complete with medical and scientific references.
+ Check out an analysis of your current and past menstrual cycles, along with an overall average, to easily observe trends.
+ Clue uses an algorithm that learns from the data YOU input. The more you use it, the smarter it gets.
+ Enhanced iOS features, including reproductive health integration with the Health app, Touch ID and Today Extensions.

General Health Tracking:
+ Log your birth control, or plan for pregnancy.
+ Track your basal temperature for more accurate ovulation and fertility predictions—perfect if you’re trying to conceive.
+ Track your health through your period, PMS, birth control, ovulation, cramps, emotions, skin, hair, sleep, exercise and more.

Inclusivity for All Ages:
+ We promise to never use flowers, butterflies, euphemisms or pink—ever. Track and get just the health information you need.
+ Clue is a gender-neutral period planner and health information—for everyone who has a menstrual cycle.
+ Suitable for all ages from teenagers upwards.

Accessible Data:
+ Fastest data entry of any period tracker
+ Record of your period dates and symptoms
+ All of your data is on hand for doctor’s appointments
+ Import and sync data from other tracking apps like Apple Health
+ Track your basal temperature for even more accurate ovulation and fertility predictions—perfect if you are trying to conceive
+ Get to know your body and identify unique health patterns and trends

Subscription Information
Want more from Clue? In addition to the personalized insights you receive from the free version of Clue, you could get forecasts that predict when you might experience PMS, cramps, and other patterns in your cycle with Clue Premium.

1 month for $12.99
6 months for $44.99
12 months for $59.99

These prices are in Canadian (CAD) dollars. Pricing in other currencies and countries may vary and actual charges may be converted to your local currency depending on the country of residence.

Once purchased, subscriptions automatically renew unless auto-renew is turned off in your iTunes. Account settings at least 24 hours before the end of the payment period.

Please note: Clue – Period Tracker is not a contraceptive.

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What's New

Version 4.0.6

Bug fixes

Ratings and Reviews

4.7 out of 5

671 Ratings

671 Ratings

Great App


Super useful and informative!

Great regulator for period tracking


It helps detect when the period will be approx. and with unprotected days when missed a pill



This app is really good i love it. I’ve been using it for the past year and it helped me alot


BioWink GmbH
134.8 MB
Health & Fitness
Requires iOS 10.0 or later. Compatible with iPhone, iPad and iPod touch.
English, Danish, French, German, Hindi, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
Age Rating
Rated 12+ for the following:
Infrequent/Mild Medical/Treatment Information
Infrequent/Mild Mature/Suggestive Themes
© BioWink GmbH
In-App Purchases
  1. 1 Month $9.99
  2. 12 Months $58.99
  3. 12 Months $59.99


  • Family Sharing

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

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