Like dagw said it gamifies health. This makes a big difference for some people. For me I use it more for convenience. There is good evidence that logging your

Like dagw said it gamifies health. This makes a big difference for some people. For me I use it more for convenience. There is good evidence that logging your behaviour promotes healthy behaviour. With fitbit I can log my food intake and it will automatically log my activity and weight. In the past I would have logged weight manually in an excel spreadsheet and probably just not tracked activity as closely.