 And I've realized that I still don't really understand some of those basic geographic realities of where I live. I only know how to get from point A to B, because my phone tells me. But I often don't know point C or D or E. Which brings up something else that Paul Theroux told me years ago. It's when you take the wrong road that things can get interesting. That's sort of keeping in one of his other observations, that you remember a trip more vividly when something goes wrong. All right, back to our smartphone apps and the difference between Google Maps and its sister offering.