in ios 7 through ios 9, it featured a single-paged slide up panel with a blurred background, which provided a layer of translucency over the content below. the design for the most part remained the same, aside from a few small, occasional changes. due to the intense resources needed to create a blurred effect, iphone 4, ipad 2 and ipad 3 do not feature a translucent background, and instead feature a grey background with slight transparency without blur.