Frequent flyers know the agony of the middle seat. But thanks to a little-known feature in the United Airlines app, thousands of passengers are now snagging coveted aisle and window seats. The app’s “Expert Mode” provides real-time seat maps, allowing savvy travelers to strategically select their seats well before boarding. By enabling this feature, you can view every seat’s status, including those typically held for elite members or last-minute upgrades. Next time you book a flight, activate “Expert Mode” in the United app to increase your chances of avoiding the dreaded middle seat.