Face ID Unlocks an iPhone More Slowly Than Touch ID, but is Faster in Day-to-Day Usage
Juli Clover / MacRumors :
Context & Ripple Effects
When Apple replaced the home button with the infrared camera, flood illuminator and dot projector sensor stack behind Face ID, the open question was whether the swap cost users time at the lock screen. Early iPhone X hands-on impressions already suggested Face ID felt quicker than rival phones' face unlock, and Troy Hunt's security assessment argued it wasn't less secure than Touch ID or a PIN in practice.
Juli Clover's measurement closes that loop with a nuance: the raw unlock is slower than Touch ID, but the end-to-end experience is faster because authentication happens before the swipe completes. That distinction matters for anyone deciding between the iPhone X and Touch ID models still on sale.
First-order effects
- Buyers weighing the iPhone X against cheaper Touch ID iPhones get a data-backed answer to their main usability objection: the slower sensor read is offset by gaze detection that starts authenticating the moment the screen wakes.
- App developers who adopted the Face ID API now have evidence the friction penalty they feared is smaller than it looks, since Apple's flow hides the latency inside the raise-to-wake gesture.
Second-order effects
- Rival Android makers' face-unlock features are now benchmarked not on unlock speed alone but on whether they authenticate pre-swipe like Apple's, raising the usability bar for the whole category.
- Apple's case for dropping Touch ID from flagship iPhones strengthens, pushing accessory makers and enterprise IT to treat facial biometrics as the default enrollment path rather than a fallback.
Third-order effects
- If the pattern holds, authentication becomes ambient rather than deliberate — a trajectory Apple extended when it brought Face ID and Touch ID logins to the web in Safari 14, moving biometrics from unlocking the phone to signing in everywhere.
- Biometric vendors and regulators face a market where the acceptance test shifts from 'is it as secure as a PIN?' — the question Hunt addressed — to 'is it fast enough that users never notice it?', which favors sensor-heavy designs over cheap camera-only unlocks.
The trend: Smartphone authentication is shifting from touch to face as the primary biometric, with adoption decided by end-to-end workflow speed rather than raw unlock latency.