Credit: C. Scott Brown / Android AuthorityTL;DRThe United mobile app now shows estimated TSA security wait times at its US hub airports.The feature includes separate estimates for standard screening and TSA PreCheck lanes.With little sign of a resolution to the shutdown, the tracker could help you better judge when to head for security before your flight.As the shutdown drags on, the airport chaos you’ll be all too aware of is a compound problem when you’re preparing to travel. The long lines are a test of your patience, but more importantly, it’s hard to know exactly how long the wait will be, and whether it’ll mean you’ll miss your flight. United can’t do much to speed up the process, but it is now trying to make it a bit less of a guessing game with a new feature in the mobile app that shows estimated TSA wait times at its US hub airports.As outlined in a press release, the airline says the new tracker is now rolling out in the Travel section of the United app for passengers flying through its hub airports in Chicago, Denver, Houston, Los Angeles, New York/Newark, San Francisco, and Washington, DC. It shows estimated wait times for different security lanes, including standard screening and TSA PreCheck.