Tim Cook Apple Inc. CEO Tim Cook declined to provide specifics last week about the agenda for this week's Apple developers conference. (The Associated Press) Apple is previewing new features for phones, tablets and Mac computers at its 25th annual conference for software developers in San Francisco. There's speculation that Apple could use Monday's keynote to showcase its plans to help manage people's health, finances and homes. There's also a Ferrari spotted in the building, an indication that Apple will update people on CarPlay, its project for embedding automobiles with some of the iPhone's main applications. Here are the highlights on what's been announced so far and what's coming: CHANGES TO IPHONES AND IPADS: — Apple previewed new features in iOS 8, the next version of the operating system for iPhones and iPads. The new software will likely come with new devices for the holiday season, with free updates available for recent models.