A helpful item

I've wanted to try one application in iPhone ' Nike + iPod '. I didn't know how to use this App to work out for jogging or running. While I was indifferent for running because it seems tough for me but I started to walk fast recently for my health.
That's why I began to notice this training App.
I was searching about the App and learned how to use it.
There are two ways to start it.
One is to buy a sensor for the App by ¥2,200. It's adjusted to one of the shoes. So sensor catches the time, distance and location, finally records those results. It's strict and correct record for veteran runners.
The other one is ' Nike GPS ' by ¥170.
It's a kind of time keeper and help support runners to keep jogging even for beginners.
I surely bought the inexpensive one because I'm not going to aim the strict record nor tight running but just fast walking every day.

I'm very satisfied with this App and feel like to keep walking even in the cold day or night. I promise myself wether day or night, at least once a day I walk out 30min or 5 km.
One problem is that I can't take my dog for my regular walking because dog walking is not so practical one.
She likes stopping and smelling to check her places because of their native habits. If I hurry her for my practice she would not like walking!
I need to find spare time for her walk.