If you are just after the numbers then I don't think it matters who enters them into Fitday, but if she is trying to loose weight then I think she would greatly benefit from the support and the feedback provided in the forums.
To me the forum is one of the best features of Fitday. It really helps me to hear of the trials and successes of people struggling with the same issues as I have.
I hope that whatever method she chooses works for her.
Starting Weight - 295 - 09-Feb-11
April Fool's Goal - 180
Current Weight - 201