Texting and walking at the same time is wrong. Talking on the phone while strolling down the street is wrong. Leaving the sidewalk to stop and consult the information on a cellphone, preferably while alone, is OK. What's on Walking Off the Big Apple's iPhone: A List Walkmeter GPS Walking Stopwatch for Fitness and Weight Loss . While out walking, Walkmeter tracks routes, time, speed, and elevation. This is an excellent app for recording improvised or impromptu strolls, especially with many unplanned detours. The GPS function maps out the actual route. The app keeps a running tally of calories burned while walking, useful for weight loss goals. Another welcome feature is the ability to switch over to other modes of activity, including cycling. An indispensable app for city walkers. $4.99 New York City Compass , designed by Francesco Bertelli, is an elegant compass calibrated for Manhattan, with indications for Uptown, East Side, Downtown, and West Side. While facing a cert