Apple's Touch ID relies on your fingerprint to unlock your device or certain features in apps like Apple Pay, whereas Face ID relies on facial scanning. Useful as Face ID can be, it's unfortunately only available on the iPad Pro. There's also the issue that Face ID requires certain hardware other iPads don't have. Those with an iPad shouldn't feel too bad, as many Mac users are also wondering if Apple will ever replace a Mac's Touch ID with Face ID. While getting Face ID involves paying a premium, Apple at least does its best to justify the higher cost.