App downloads were flying high this October, rising 23 percent since last month and reaching 7.9 million total downloads. With the late September release of the latest iPhone—the 6S—consumers got straight to work during October, installing apps on their new devices. In the meantime, the cost to acquire a loyal user fell slightly. This leveling of CPLU happened as a result of app loyalty: as many iPhone 6S users added ‘vital apps’ to their new devices—apps they already have a tendency to keep and use—this drew the overall cost to acquire users in October down. Higher media costs this October…..