US consumers who use mobile shopping apps turn to them frequently, a new survey finds. More than one-third of people (35 percent) use shopping apps between two and five times a week, while 28 percent use them at least once a day, according to Visual Objects, a company that offers a portfolio website that showcases work from top creative firms located around the world. Visual Objects’ data supports findings from another survey, which found that the number of retail apps on the average smartphone doubled within the last year, up to a....