How do I know when I am ovulating?

The predicted ovulation day that you see in your Period Tracker app (blue circle) is only an estimate – based on the period data you enter into the app each month. We recommend using the results of ovulation tests to determine your exact ovulation day and logging these in the app for the most accurate future predictions.
*Note: Information provided to you will be based on the data you choose to disclose and therefore depend on the amount and accuracy of such data inputs by you. Data supplied in app is secure and is accessible only to you.