Right. I've always been under the impression that I ovulate around day 15 (my cycles are always 28 days long) but, according to Flo, I ovulated on day 10 this month. I use FF as well and that does not believe ov has happened yet. My chart is attached.
Using clues from my body (which obviously are more reliable!), I had cramps yesterday and today (cd13) and my cervix is high soft and open today. So I agree with FF, I think!
Anyone else left more confused by apps than not??