1. No PNR required. On the day of the journey, just go to the Trip tab and enter your Train details. You need to login through your IRI account. . 2. Start the trip before you proceed to the Station. All Train details are automatically downloaded and saved. All Train Details, Time-Table, Passing Stations, Train Crossings/Overtakings will be available Offline during your Trip. . 3. Thereafter, your EXACT Train Position will ALWAYS be available. Even OFFLINE, irrespective of Network Connectivity. Train Delay Status, kms from the previous Passed station, kms to the next upcoming Station, kms to the Next Halt, ETA at Destination. . 4. Check out the IRI Forum, click and upload Pictures, "virtually Offline". Just post it and forget it!!! The picture will upload incrementally in the background whenever there is Network connectivity. You do not have to worry about it. . 5. Record and upload Station announcements, Train sounds. Just click on the Microphone icon, and you immediately start recording. . 6. All your Trip Diary postings are available Offline in RailCal, as well as in the IRI Trips tab.