Touch ID

Touch ID is a feature that was first released with the iPhone 5 S. It is one of the three security options included with Apple devices, the others being the Passcode Lock and Face ID.

Usage
Touch ID is activated through a fingerprint sensor built into a home button with a surface, and can be used for unlocking an iPhone or iPad, as well as authorizing purchases. The sensor can also be found at the top-right corner of keyboard of the MacBook or the Magic Keyboard for Apple M1-based Macs.