Hi, I just really like walking. I walk everywhere and for as long as possible. I don't really know what 'the app' is and don't like technology. i gave up smoking 2 weeks ago and now walk approx. 10-15 miles a day before and after work (where I walk everywhere rather than send emails to people a two minute walk away) to keep my mind off it.
I'm not an expert, I just really like it.