Technology

Fingerprint, Face and App Unlock: How Modern Smart Lock Access Works

29 April 2026

A clear look at the technologies inside modern smart locks — biometrics, encrypted app control and the fallbacks that keep users safe.

Modern smart locks combine several access technologies so users can choose the method that suits the moment. Understanding how each one works helps you explain the value to your customers.

Fingerprint Recognition

A capacitive or optical sensor reads the ridges of a finger and matches them against stored templates in under a second. Quality sensors handle dry, wet or worn fingerprints and store data only on the lock, not in the cloud.

Face and Palm Recognition

3D face and palm-vein recognition let users unlock hands-free, which is ideal when carrying bags or groceries. Depth-sensing cameras resist being fooled by a photo, keeping convenience and security together.

App and Remote Control

A companion app unlocks the door, issues time-limited passwords for guests or cleaners, and logs who came and went. Communication is encrypted so codes cannot be intercepted.

Secure Fallbacks

Good locks never leave a user stranded. Common fallbacks include:

• An anti-peep PIN keypad
• A concealed physical key
• An emergency external power port
• Auto-relock and tamper alarms

WONLY engineers these layers into every smart lock. Reach out for full specifications and integration options.