A free app for Android, by EasyTrain – IRCTC Ticket Booking.

IRCTC is a railway ticket booking service and a fare-based, distance-measuring app that allows you to check train schedules, find train status, and book tickets online. You can also check the status of PNR and get information on the trains you want to ride. 

IRCTC provides information on all the railway lines in India, as well as trains for each line. You can also book your ticket based on the route, train, and date you want to travel. The booking fee is applicable to each ticket you buy.

This app is a handy companion when traveling. You can also use this to order food without leaving your seat.