Hi Ginny!

Glad you de-lurked and stopped by!
To answer your question -- I use Fitday for food tracking but have never done it for activities. I suppose I'm kind of skeptical of those numbers, the same way that I am of the cardio machines that tell you that you burn X calories per hour (it always seems so high).
I've had the metabolic testing done at my gym (BodyGem) and supposedly my RMR is beteween 1500 and 1600 calories a day, so I should be able to eat well over 2000 and maintain my weight. In my experience, it doesn't work that way. So, after much frustration, I've given up on all those numbers and formulas and just go by things like the scale and BF% and clothes to see what works for me.
For me, if I stay around 1400 - 1500 calories a day, I can maintain or lose a bit, so that's where I am right now. I'd like to get my body fat % a little lower so I'm not quite at the maintenance point yet.
Hope that helps!