Magazine picks biggest CU as tops among military-oriented financial institutions.
Copperas Cove, Texas, facility brings branch total to 235, the Vienna, Va.-based cooperative said.
App developed in-house, released after 18 months or work.
The $54 billion Navy Federal would cover direct deposits of active duty military members if the government shuts down next week.
The first loan participation Pen Air Federal Credit Union was involved in teamed the cooperative up with a regional bank.
Air Force FCU was at the top of the list, followed in order by USAA Bank, PenFed, Navy Federal and Armed Forces Bank.
Pensacola operations center will grow to 2,800 employees with 340,000-square-foot addition.
Big credit union also honored in 2008, 2013; only credit union cited by national business magazine.
With the exception of two branches in New Jersey and New York that are closed due to power outages, Navy Federal said all of its branches were open Thursday.
Closures follow shutdown of federal government after hurricane.