Fun trivia for Monday morning. There are an estimated 1 billion iOS devices on the planet. Each iPhone is unlocked (by entering the 4 digit pin) on average, 80 times a day, a process that takes around 2 seconds. Think of the amount of time mankind spends unlocking devices. Touch ID saved us approximately 5.6 billion hours by reducing unlock time to 1 second. Face ID will save us another 8.5 billion hours - a million years, or 12,500 lifetimes. That's why innovation is so important.
Source : Horace Didieu - the Asymco Blog