The optional Period and Fertility Prediction feature predicts the start date and length of your next period as well as your next fertile window. The predictions are based on an average of past cycle data, including your average cycle length, average length of menstruation, and average length of the luteal phase (the app calculates the length of the luteal phase based on your basal temperatures and temperature shifts). The more data you enter into Kindara, the more accurate the predictions will be.
For new users, the predictions are based on the average cycle length entered upon creating an account. After a user has been charting for several cycles, the app calculates the fertility and period predictions based on the data she’s entered.
Period and Fertility Prediction can be turned On or Off in the Settings section of the app. When Period/Fertility Prediction is turned On, you’ll notice new symbols that appear in your chart as well as in Calendar View. For iOS devices, the red dots represent predicted menstruation, and the stars represent predicted fertile days. Lighter pink stars = less fertile, darker pink stars = more fertile, and the dark pink star with highlights around it = most fertile.
Here's how the symbols will appear on iOS devices:
For Android devices, instead of stars, all of the symbols are circles. For the period prediction you'll see red circles, and for the fertility prediction you'll see pink circles. Lighter pink circles: less fertile, darker pink circles=more fertile, and darkest pink circles=most fertile.
How to turn Fertility/Period Prediction On or Off:
How Fertility and Period Prediction looks in Calendar View on iOS.
Users with goal - Avoid Pregnancy will only have access to Period Prediction. This is because Fertility Prediction is based on past cycle data, and not the data from the current day – meaning that it's not always 100% accurate at determining the fertile window, and shouldn’t be relied upon as a means of avoiding pregnancy. Users with goal – Get Pregnant or Track My Period (formerly ‘Other’) will have access to Fertility Prediction as well as Period Prediction. However, because the predictions are based on an average of past cycle data, and because many women do not have perfectly regular cycles, it’s a good idea to confirm ovulation and the fertile window not just with the Prediction feature but also by monitoring your fertility signs each day. Read more about how to interpret your fertility signs so you can know when you’re fertile, and when you’re not.