I had a bodymedia a few years ago, loved it, wore it 23 hours a day. Tracked calories burned, sleep patterns and seemingly other things that I can't recall right now! You could log food online so you could compare cals in vs out. I think it was around $200 & approx. $8-10/month for the online aspect. Very, very cool toy to geek out with. Eventually after about 2 years, the armband made me breakout from where the metal touches the skin. I then tried the fitbit. It's nice but not as techie. Since it didn't touch my skin (usually I had it my pocket), I figured it can't possibly be as accurate and was more of a pedometer, which is still cool. It was only around $100 and no monthly fees. You could still log cals online and compare in vs out. Again that was about a year or so ago and I think they've improved things. I broke mine. Fitbit is way more discrete. Bodymedia or any with an armband is a commitment. You are supposed to wear it all day for it to be really accurate. I use a HRM now only when working out and it always shows a much higher calorie burn than either the bodymedia or fit bit. IMO, bodymedia was probably the more accurate for a true daily account of calories burned, but they all have their place. Again, it's been a while since I've used both, so hopefully someone using either now can be of more help to you.