M-Indicator is the best app I habe came through if you wanna travel in mumbai or travel through express trains all over india then this is must have app.I personally use this app many times for confirming train timings.we can also check the trains PRN status.The app is very very good with a friendly interface.It also has a womens safety feature which is also great if wanna travel in mumbai n dont know train timings then this is a great application.