Picking someone up from the station usually means one of two outcomes: arriving too early and waiting around, or arriving late because the train got in faster than expected. Neither is necessary if you check the right thing.
You don't need their PNR or login to track their train
A common assumption is that you'd need the traveler's PNR or IRCTC login to check on their train — you don't. Live train running status only needs the train number and journey date, both of which the traveler can share with a quick text, without sharing anything about their ticket.
Time your departure off the live status, not the timetable
If you leave for the station based on the train's original scheduled arrival, you're ignoring the most useful information available — its actual current delay. Checking live status shortly before you leave home tells you the real expected arrival, which is what your departure time should be based on.
A quick habit that saves the wait
Check once about an hour before the scheduled arrival to get a general sense, then again as you're about to leave — running status becomes more accurate the closer the train gets to its destination.
Where CoSeat fits in
Check live train status on CoSeat with just the train number — no need for the traveler's PNR or account. It works whether you're the one traveling or the one waiting at the station.