The iPhone XS is the successor to the iPhone X and was released by Apple in 2018 at the same time as the larger iPhone XS Max. Although the device on the outside - apart from the new gold ready - has remained unchanged, some things have changed on the inside. The XS is even faster and more energy efficient than the iPhone X. This is due to the new A12 Bionic processor. This processor has even more computing power and is extremely energy efficient. So you can use the Apple iPhone XS even longer without charging it in the meantime.