Since Natural Cycles is able to confirm your ovulation, it means the app can tell you how many days pregnant you are, while also calculating a predicted due date that’s based on your precise ovulation day.
If there isn’t enough temperature data around your ovulation day or your temperatures have fluctuated too much, you may want to enter your due date manually. You can do this in the profile view in the app (see screenshots below).
Natural Cycles counts your baby’s due date in a different way to how your midwife or doctor may count it. The app calculates from ovulation, not from the first day of your missed period, which is how the healthcare system traditionally measures pregnancy and calculates due dates. This means your due date given by Natural Cycles may be a little different from the one given by a healthcare professional.
For more information on how Natural Cycles calculates pregnancy weeks, please have a look at this article.