The iPhone 3GS is the successor to the iPhone 3G that features the same outer design but offers redesigned and upgraded internals. Apple claims the "S" stands for Speed (iPhone 3G Speed) and sees more powerful internal processing to offer a faster experience. According to Apple the apps open twice as fast as regular 3G, and web browsing is up to 3 times as fast. The other aspects of the iPhone that have undergone upgrades are the camera, internal battery and more built-in features such as Nike+.