Those who frequently ride the New York City subway just got a little help to make their travel run a bit more smoothly. The MTA has released an iPhone and web app called Subway Time, which offers up-to-the-minute updates of where trains are and when they’ll be pulling into the station.

Not every train is trackable, as the majority of them need to be upgraded, a process that would be time-consuming and expensive, according to the MTA. Trains 1, 2, 3, 4, 5, 6, and the 42nd Street Shuttle are all supported by the app.

While the service may be helpful, the app itself isn’t getting great reviews, with calling it sluggish and dated. Luckily, the MTA is releasing the data behind the app to developers, so chances are we’ll see some really helpful, effective applications in the near future, especially once Google get their hands on it.