The Touch ID was a revolutionary addition to the iPhone line-up when the iPhone 5S was released. Instead of having to click the home button, swipe to the right, and enter your passcode, Touch ID allowed iPhone 5S owners to access their iPhones simply by pressing their fingerprint to the touchpad.
WWDC
WWDC 2013: Apple Gives Apple Design Awards
The design of an application is directly related to how the application is received by the user. Software design is separated into two fields, the aesthetic aspect of user interface and the emotional aspect of user experience.
