For the Galaxy S7 and S7 edge, the look of the icons has been updated to be more unified and natural. For native apps, the icons all come in a “squircle” shape (a square with rounded edges), creating a pleasing and organized appearance. For third-party apps, users can turn on the Icon background, which creates a squircle container background for all those icons, too, unifying the look of all of a user’s apps. In addition, many icons now offer two different styles—a traditional flat look, and a more 3D look.
How to Set Up: Settings > Display > Icon backgrounds
