breathe ilo indicates the fertile phase, not the ovulation itself.
It would be unreliable to set the ovulation to one day, because it can vary from woman to woman and cycle to cycle. In order for your fertile phase to be correctly indicated by the breathe ilo cycle tracker, it is necessary to take the measurement at rest, sitting down and daily.
Only then an accurate result can be guaranteed.
To learn more about the learning cycle, take a look at our article “What is the learning cycle?”.