Pedometer
I've found the iPod nano includes pedometer last weekend. That's unbelievable! My pedometer is much heavier than iPod. My padometer includes ONLY padometer. The iPod is originally a portable music player, including shooting videos, voice recording, FM radio, of course clock, calender, stop watch, some types of game, and....padometer is one of them.
Since when I found padometer in my iPod, I'm keeping it on me anytime, anywhere (expect sleeping).