I seems that the ios system is used most population. Ios is popular over android from choose of most people . View from the brand and the capabilities of the machine , screen shape, thickness of the machine. I like the design of the structure of the iphone. example In creating iPhone 6, we scrutinized every element and material. That’s how we arrived at a smooth, continuous form. A thinner profile made possible by our thinnest display yet. And intuitively placed buttons. All made with beautiful anodized aluminum, stainless steel, and glass. It’s a thousand tiny details that add up to something big. Or in this case, two big things: iPhone 6 and iPhone 6 Plus