Considering deleting app

I have this one and another (that is more of a calendar) but both are so far off from each other on when AF is to begin. Last month the other was correct- so if it is again I am going to delete this one.

I just found out I have PCOS and so its like I really need a lot anymore- doctor says I cant get pregnant unless I take fertility pills but insurance dont pay for them- plus hubby dont want me taking them.