What Is a Smart Lock? Comprehensive Guide
A smart lock is an electronic locking system that replaces or supplements a physical key with digital authentication — smartphone, PIN code, fingerprint, or NFC card. It can be integrated into your existing lock (retrofit) or installed as a full replacement. It works over Bluetooth, Wi-Fi, or Matter, and can be managed remotely, granting or revoking access without physically exchanging a key. Leading brands like Nuki meet European security standards, making installation and daily use straightforward.
What a smart lock actually is
A smart lock replaces the physical key with one or more digital methods while keeping the mechanical lock intact. On a retrofit model like Nuki, the device mounts on the inside of the existing cylinder. Your physical key still works from outside — the smart layer sits on top, not in place of, the existing security.
The lock is controlled via Bluetooth Low Energy (BLE) from your smartphone. Adding a Bridge or using a built-in Wi-Fi connection enables remote access from anywhere in the world.
Why it matters
Security
Traditional keys can be lost, copied, or stolen. A smart lock logs every access attempt, sends instant alerts on unauthorized entry attempts, and lets you revoke any access grant remotely within seconds. Nuki uses AES-256 end-to-end encryption, stores data on EU servers in compliance with GDPR and KVKK, and carries AV-TEST certification.
Convenience
No more searching for keys when your hands are full. With Auto Unlock, the door opens as you approach. Voice commands via Alexa, Google Assistant, or Siri work for hands-free control. Keypad PIN or fingerprint gives phone-free access.
Rental and property management
For Airbnb hosts and property managers, smart locks remove the key handover step entirely. Each guest receives a time-restricted access code that expires automatically at check-out. No key cutting, no key boxes, no coordinating with neighbors.
How connectivity works
Bluetooth
Communicates with your smartphone within ~10–15 meters. No internet required; works even if your Wi-Fi goes down.
Wi-Fi and remote access
Bridge or built-in Wi-Fi connects the lock to your network, enabling lock/unlock from anywhere. Useful for granting emergency access or checking lock state while away from home.
Matter and Thread
New-generation smart locks support Matter (open application standard, works across Apple/Google/Amazon/Samsung ecosystems) and Thread (low-power mesh network, low latency). The Nuki Smart Lock Ultra supports both.
FAQ
Are smart locks vulnerable to cyberattacks?
Quality smart locks use AES-256 encryption and TLS protocols. Nuki follows EU GDPR standards and publishes regular security updates. With firmware kept current and 2FA enabled, the attack surface is minimal.
Does the smart lock work if the internet goes down?
Yes. Bluetooth-based control works without an internet connection. Remote access via Wi-Fi requires internet; local Bluetooth control does not.
What happens when the battery runs out?
The app alerts you well before the battery is critically low. If it does run flat, the door opens with a physical key. Some models also support emergency external power via a 9V battery contact.
Can I install a smart lock on my existing door?
Nuki retrofit models mount on standard European-profile cylinder locks without any modification to the door. Installation takes under 15 minutes and the lock can be removed if you move.
How long does the battery last?
Usage-dependent: roughly 6–12 months at 10–15 cycles per day. The Nuki Power Pack provides a rechargeable alternative.
Nuki ready bundles
- Home Set Basic — Entry-level smart lock bundle — 15,490 TL
- Home Set Pro — Full-featured bundle — 26,990 TL
- Home Set Ultra — Comprehensive bundle — 31,290 TL