When I first lost the weight over 5 years ago, I relied on a pedometer to make sure I would get over 10,000 steps a day. It worked and kept me motivated, but it was easy to lose and the battery would go rather quickly.
I eventually upgraded to a FitBit Charge and that was a big upgrade from the pocket pedometer. I actually had three FitBits over the last couple years. It was cool as it would vibrate on my wrist whenever I reached my goal of 10,000 steps. The only thing I didn't use the FitBit for was to track the sleep, which didn't interested me.