• October 28, 2011

Acquity Group just released its third annual study on how retailers are using mobile applications, reporting that 37% of the country’s biggest stores have a mobile site, up from 12% last year, and 4% in 2009. And one in four large retailers now have at least one mobile app. The percentage of companies with a site optimized just for iPhone eased from 11% in 2010 to 9% in 2011, as mobile browsers become more similar across different devices.

The report, which focuses on the Internet 500, rated these in the top 10 of Best-in-Class analysis: Amazon, Armani Exchange, Barnes & Noble, Buy.com, Cabela’s, Gilt Groupe, the Home Depot, Newegg, Walgreens, and Wal-Mart.