Before I got a Garmin, I used a Fitbit along with my phone to track my runs.  The Fitbit thing is mostly just for fun.  I would have fat coworkers connect with me for about two weeks, get embarrassed by the fact that most people out-walk them by at least 3 miles a day and then either disconnect or ditch their Fitbits (there was one very fat dude who literally only did about a thousand steps a day.  I do that before I even get to work just walking around my house!!).  You would think this would be a learning experience for them, but nope.  I know of nobody who was actually motivated by their Fitbit to lose weight.