This app shows the same inaccurate times that the MTA lists on their schedule. So really, it’s the MTA’s schedule that has little relationship to reality. Why the MTA can’t implement accurate train tracking for all the lines has been a mystery to me, particularly in this age of GPS, Wifi, cellular data, etc. Anyway, the bottom line is that the arrival times of trains is fairly worthless. But the app has a very well designed interface. I think when the MTA gets their act together (…don’t hold your breath), smart phone transport apps will be great, not barely useful like this one is.
Avbo about NextStop - NYC Subway, v2.4.3