Find the next train schedule in a New York minute. onTime is fast and easy to use. It is designed with commuters in mind. With onTime, you can look up the schedule for different agencies anytime anywhere without having to carry and dig through paper schedules. Know exactly the next train with the count down clock. Be on time and be environmental friendly at the same time.
After trying several apps, I think this is the most useful because you can still see a train schedule even when you don't have internet access, especially useful if you want to figure out the next available train while you're underground in a subway without a signal. I had hoped that the MTA's own app would have this functionality, but so far not.
It also provides live data when it can, such as the track a train may be on at Penn Station, though I'm not sure how accurate that data is.
Also, it's just for one system really, but works for that system. While you can get complete transit instructions from Google, those require an internet connection and, as far as I can tell, don't have real-time data about things like delays or track number.
I used to use the coocoo app which was a pathetic joke. This app seems to work even without a cell connection as far as departure and arrival time goes. I use this daily when I'm pushing all the tourists out of my way because they're dumb and I'm frantic trying to rush to whatever train will get me out of the cesspool that is NYC!!!
It works, 5 stars based on accuracy for schedules
This makes it so much easier than getting on the computer to search or look for track information while at Penn Station or to even try and find those train booklets at Penn. One of the most useful apps I have by far.