If your age is >40, the 1% prediction rate may be accurate based on natural fertility estimates.As the app is predicting your natural fertility based on this information, if this date of birth is incorrect, please edit it accordingly so that the app can properly make a prediction.
This is an issue we commonly see with accounts that have older birthdays. Please go to your More tab/Side bar > Health Profile and double check that the birthday you inputted reflects your accurate age.