TripIt is offering TripIt Pro for 24USD. If you travel a bit the normal price of 49USD is worth it, but 24USD is a bargain in my book for TripIt Pro.
I rely on the gate number and delay notifications when transferring between flights. It means I don't need to check the boards. Often TripIt knows about delays before the airline staff do.
Welcome to OzB.
Not only TripIt knows, it tells you the truth, not some madeup BS story the airline tells you.
I barely travel now, but I upvoted this deal because the app (and subscription) are worth it.