Many luxury marketers are preparing to engage their high-income targets through mobile. According to an analysis by L2 Think Tank, 70% of 100 select luxury brands had at least one iOS mobile app in January 2013—the same percentage that had one in December 2011. Apps, however, have proliferated: The number available in the Apple Store increased from 196 to 238. This increase reflects, at least in part, an increase in app development for tablets. According to L2 Think Tank, 53% of the new iOS apps developed were either iPad native apps or apps containing versions for both iPad and iPhone. Read the rest at eMarketer.