Travelers in airport security lines staring at their phones could very well end up learning how long they’ll be standing there thanks to a feature that estimates wait times in the updated Fly Delta app.

The airline is testing the security wait time feature in just two markets — at Seattle-Tacoma International Airport and New York’s LaGuardia Airport. Travelers leaving those locations can compare checkpoint times for Sky Priority, TSA Pre-Check, CLEAR and standard TSA lines.

Here are some of the other features being rolled out as part of the updated Fly Delta app. Some of them won’t be available until later this year, the airline said in a news release.

Color accents: Those shopping for fares inside the app will notice new colors associated with Basic Economy, Main Cabin, Delta Comfort+, Delta Premium Select/First Class and Delta One. The visual cues will align in booking, seat selection, and on boarding passes within the app, mirroring colors seen on screens and signs at the gate as boarding begins for a flight.