Cycle Tracker, an app that helps women keep track of their menstrual cycles, has now arrived on the Apple Watch. Although limited cycle tracking has been part of Apple's iOS Health app since 2015, with the release of iOS 13 and WatchOS 6, Cycle Tracker is now its own discrete sector within the Health app on the iPhone and a separate app on the Apple Watch.  Designed to offer various health benefits that help with family planning and reproductive health problems, irregularities and symptoms, you can now enter data and view it directly on your watch.
For those who are a little bit deeper by the prospect of an app that keeps track of your periods, think of it this way: apps can keep track of your heart rate, what you eat, how many calories you have burned on the couch while you have your phone read, and how many steps you forced yourself to walk every day. So keeping track of your period is just another health-related statistic that may come in handy even if you are not someone who usually focuses on details that go beyond marking an X on the kitchen calendar and a sigh of relief relieved when it is over. Bike tracking information, also visible through the redesigned Health app on iOS 1
Cycle Tracker is great for monitoring fertility, so you can record statistics such as basal body temperature or the results of an ovulation test. The app uses that information to create a fertility window – the few days a month that you are likely to become pregnant. The more information you provide to the app, the more accurate the predictions can be. If you use Cycle Tracker continuously, you will get increasingly accurate statistics and predictions about your cycle, such as the average length and flow of your period, which can help you recognize a health problem if the results change over time. But listen to Apple's warning not to use the fertile windows as a form of birth control or to diagnose a health condition. However, it is great for collecting and sharing information with health professionals.
When you set Cycle Tracker, you can enter information about your cycle history – including the day your last period started, the typical length and the length of your cycle. You can enter this data manually or you can confirm data that was already present in the Health app or from third-party apps that you may already be using, such as Clue, Glow or a large number of others.
The fertile window will be the six days that are most likely to be fertile, based on your entered data or a positive ovulation test result. The fertile window is based on a traditional calendar and calculated by subtracting 13 days from the estimated start date of the next cycle. If you enter a positive ovulation test result, the fertile window prediction adjusts so that day five of the fertile window coincides with the first positive ovulation test result in a cycle.
Using Cycle Tracker on your watch
When you enter information in Cycle Tracker on your Apple Watch, it is synchronized with Cycle Tracker on your iPhone in the Health app. Follow the steps below to enter essential tracking information in the Watch app.
Track your cycle: to track your cycle from your Apple Watch, open the Cycle Tracking app, swipe to the correct date, and tap the oval to register your period.  Press the Digital Crown on your Apple Watch to view all available watch apps.
Follow all those irritating symptoms that you suffer every month in the Cycle Tracker app.
- Tap Symptoms .
- Select all the symptoms that apply to you.
- Tap Ready .
Check the date for your next and last period: to see the dates of your Apple Watch, open the Cycle Tracking app and then scroll to Period prediction or Latest menstrual period.
Check your period or fertile window via color-coded symbols: a light blue oval marks your six-day fertile window. Mark red stripes on a circle when you should start your period. Solid red circles follow period days. Purple dots mark days on which you have recorded information.
Set notifications for tracking the period and fertility: predictions are based on data you enter and start after you enter your last period in the app. If you register a period before it is predicted to start, you will not receive a forecast message for that cycle.
If you don't need the app
Let's face it, some women find it useful to keep track of this kind of reproductive health information, especially if fertility or irregular cycles are a problem. But many cannot be bothered by it or are interested in recording more details than just marking the calendar on the refrigerator. If you are, there is an option to easily remove Cycle Tracker from your Apple Watch and be ready. To do this, hold down the app icon until all apps are moving and tap the X in the upper left corner.
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