This iOS App Icon Shape icon is made in Material Design style developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 4,400 icons, all in the same style and quality.
This icon is made of a dashed line in the shape of a square with rounded corners, inside the square are two circles with one inside the other. Also inside the square is two lines shaped like an X they are drawn on top of the circles. The point they cross at is the center of the icon.