What’s the difference between the predicted ovulation date and the real ovulation date on the customer’s APP?

The predicted ovulation date is the ovulation date deduced based on the calibration of the latest menstrual cycle.
The real ovulation day is the ovulation date calculated based on the change curve of your BBT after synchronizing your body temperature data daily. The real ovulation day is more valuable for those women that want to get pregnant and have an irregular menstrual cycle.