Apple just launched iOS 10 last week, but it's already working full throttle on the next update. Today, Apple made iOS 10.1 available in its public beta program, just one day after launching it for developers. The latest update adds Portrait Mode to the iPhone 7 Plus, allowing owners to take professional-looking photos that artfully blur out the background to better focus on the main object. Portrait Mode requires two photos to create a depth map, which is one reason it's limited to the iPhone 7 Plus -- only the Plus has a dual-camera system.