What can a smart door lock do?

A smart lock lets you open your door without a traditional key — typically by fingerprint, a PIN code on a keypad, an RFID card, a phone app, or a physical key as backup. Beyond convenience, most let you create temporary codes for guests, domestic help or deliveries, see a log of who came and went, and (on connected models) lock or unlock remotely. For families it means no more spare keys under the mat, easy access for elderly relatives or children, and the ability to revoke access instantly if a code is compromised.