A press conference is scheduled for Wednesday.
"We're very excited to welcome coach Fox to the Appalachian family," said Appalachian State athletic director Charlie Cobb. "He is well-respected across the country and his winning pedigree speaks for itself. However, what really made him stand out in the search process is his commitment to building a winning men's basketball program at Appalachian State. App Nation wants a consistent winner in men's basketball and we believe that coach Fox is the right choice to not only win but do so with student-athletes that will represent Appalachian the right way on and off the court."
Fox had been at Davidson since 2001.
He's replacing Jason Capel at Appalachian State.