Pedometer App for Phone?

Fairly recently, I though A BOTT posted where we could download an app that would basically make a smart phone act as a pedometer, tracking steps, etc.   If so, would someone please  direct me to post since I can't seem to find it?

Or was I dreaming? 

 I use Pedometer Free on my iPhone.  I love it. It tracks steps, miles, time, calories, average speed etc.  If I remember correctly, it was free.

Thank you!