RIM said that 100 percent of customers making paid-for app purchases from BlackBerry App World are using devices running BlackBerry OS v4.5 or later, with 90 percent of free apps downloaded by users of these platforms. It also noted that 90 percent of paid-for apps and 81 percent of free titles were for devices using v5.0 or v6.0, indicating that “if you haven’t yet considered implementing new features using the BlackBerry Java SDK 5.0 or 6.0 APIs, now might be a good time to start.”