I react to the first two reviews of FatWatch:
mangaphreak complains, in a condescending way, that it should include metric units. This is frustrating to read, because it does. In fact, I worked pretty hard so that a user can switch between pounds, kilograms, and stones instantly.
Brent Wood says nice things about it, but that it is overpriced and only worth at most $3.99. I think if you're not willing to spend $9.99 on a weight tracker, FatWatch is not for you. It takes a certain level of commitment to manage your weight; this isn't an impulse purchase kind of thing.