DeSoto Cab driver Ed Healy works his shift with the help of the Flywheel app in San Francisco, Calif., on Tuesday, Feb, 19, 2013. The app connects riders
DeSoto Cab driver Ed Healy works his shift with the help of the Flywheel app in San Francisco, Calif., on Tuesday, Feb, 19, 2013. The app connects riders with the cab drivers using a smart phone mounted on top of the personal information monitor that is in each DeSoto cab. (Dan Honda/Staff) ( Dan Honda )