I have been using the fitbit app and consistently logging periods for over three years now. Predictions were accurate at the start and my cycles are consistent, but I had one off month in the first year and since then the predictions have been completely wrong. I even went in and changed the setup values for period and cycle length to try and nudge the numbers back to where they should be and nothing changed at all.
No amount of accurate data logging has fixed it and I can't set my own predicted periods because ~you can't log a period ahead of time~ so what am I supposed to do about this?
