Satisfaction with factory-installed navigation systems among car owners fell while the number of owners using a nav app on their smartphone in the vehicle rose over the course of a year, according to J.D. Power and Associates. The company's 2012 U.S. Navigation Usage and Satisfaction Study was conducted in October and November 2012 and involved 20,704 participants. On average, satisfaction with navigation systems was 681 (on a 1000-point scale), a 13-point decrease from 694 in 2011. Satisfaction with integrated systems dropped in all categories measured, but most notably in ease of use with a score of 637 (25 points less than in 2011). About 47% of vehicle owners indicate they use a downloaded app on their smartphone for navigation in their vehicle, compared with 37% in 2011, and 46% indicate they "definitely would not" or "probably would not" repurchase a factory-installed navigation system if their smartphone navigation could be displayed on a central screen in their vehicle.