The Apple Watch Series 2 has a built-in GPS system.[6] The most recently used apps are saved in the background, so apps and information load faster. The Apple Watch Series 2 was sold in casings of anodized Aluminium, starting at $369, and polished Stainless Steel, starting at $549[7] .The Series 1 was sold only in Aluminium, with a starting price at $269. The Series 2 still needs to be charged nightly, with an advertised 18 hours of battery life, in line with its predecessors.