Jump to How Tos ArticlesTouch ID is Apple's biometric fingerprint recognition system, used to verify Apple Pay payments and to supplement device passcodes and in-app passwords. First introduced in 2013, Touch ID is built into the Home buttons of the iPhone 5s through iPhone 8 and 8 Plus, the iPad mini 3 and later, the iPad Air 2 and later, 2017 and 2018 iPad models, and the 2015 through 2017 iPad Pro. Touch ID is also present on recent MacBook Pro and MacBook Air models.
Starting with the iPhone X in 2017, Apple began shifting away from Touch ID in favor of Face ID for authentication, and the iPad Pro followed suit in 2018.
Touch ID is built around a capacitive touch sensor that can read and analyze sub-epidermal skin layers to identify each person's unique fingerprint to make tasks like downloading apps and unlocking iOS devices more convenient. Touch ID is available in Apple's own apps and in third-party apps, allowing users to protect sensitive data like passwords or notes with a fingerprint.
Fingerprint data used for Touch ID is stored directly on each iOS device in a "Secure Enclave" and is never accessible in the cloud.