I logged a symptom and my predictions changed. Why? Valerie April 22, 2020 08:35 Updated When your cycle varies in duration, then the symptoms you enter will recalculate the prediction. The more periods and symptoms you enter, the more precise Flo’s predictions will become. Related articles Why is my ovulation window so short/long? The app doesn’t reflect the cycle duration I’ve specified Can I enter my ovulation day manually? How can I cancel my subscription? (iOS) How can I update the email address in my account? Comments 0 comments Article is closed for comments.