Why Upgrade to a Smart Lock?
Traditional deadbolts do one thing: lock. Smart locks do everything a traditional deadbolt does — plus remote access, temporary codes for guests, auto-lock, activity logs, and integration with your broader smart home setup. For anyone who has ever locked themselves out, worried about a spare key floating around, or wanted to let in a service worker while away, a smart lock solves real problems.
Types of Smart Locks
Before diving into features, understand the main form factors:
- Deadbolt replacements: Fully replace your existing deadbolt. Most secure option, but requires more installation effort.
- Deadbolt adapters: Fit over your existing deadbolt's interior thumb turn. Easier to install and remove (great for renters), but leaves the original cylinder in place.
- Lever handle locks: Replace a full door handle and lock unit. Common in apartments and offices.
Entry Methods: What's Available?
Smart locks offer a variety of ways to unlock beyond a physical key:
- Keypad / PIN code: Enter a code to unlock. Easy to share temporary codes with guests.
- Fingerprint / biometric: Fast and hands-free, but can struggle in wet or cold conditions.
- Smartphone (Bluetooth or Wi-Fi): Unlock via app, or with proximity-based auto-unlock as you approach.
- Key fob: A physical fob that unlocks on proximity. Convenient, but one more thing to carry.
- Traditional key: Most smart locks still include a physical key cylinder as a backup — which is important.
Connectivity: Bluetooth vs. Wi-Fi vs. Z-Wave
This is where many buyers get tripped up. Your lock's connectivity determines how and when you can control it remotely:
| Connectivity | Remote Access | Range | Battery Life Impact |
|---|---|---|---|
| Bluetooth only | Only near the lock | ~30 ft | Low drain |
| Wi-Fi built-in | Full remote, anywhere | Home network | Higher drain |
| Z-Wave / Zigbee | Via hub, full remote | Mesh network | Low drain |
| Bluetooth + Wi-Fi bridge | Full remote via bridge | Home network | Low drain on lock |
If you want to lock and unlock from your phone while traveling, you need Wi-Fi, Z-Wave via hub, or a Bluetooth bridge. Bluetooth-only locks are only controllable when you're close to the door.
Auto-Lock and Access Scheduling
Two of the most practically useful smart lock features are often overlooked:
- Auto-lock: The lock secures itself after a set time (e.g., 30 seconds after closing). Eliminates the "did I lock the door?" anxiety.
- Scheduled access codes: Create a code that only works Monday–Friday, 9am–5pm for a cleaning service. Revoke it instantly when the relationship ends.
Installation Difficulty
Most smart deadbolt replacements install in 15–30 minutes with a screwdriver. The key variable is your door prep — specifically the backset (distance from door edge to lock hole) and the bore hole diameter. Most locks accommodate standard US measurements (2-3/8" or 2-3/4" backset, 2-1/8" bore), but always check before buying.
Important Security Considerations
Smart doesn't automatically mean more secure. Evaluate:
- ANSI/BHMA grade: Grade 1 is the highest residential security rating — worth seeking out.
- Pick and bump resistance: Even smart locks can be physically attacked. Look for anti-pick pins.
- Account security: Use two-factor authentication on your lock's app account — this is non-negotiable.
- Firmware updates: Choose a brand with a track record of releasing security patches.
Final Thoughts
A smart lock is one of the most user-visible upgrades you can make to a home security setup. Prioritize connectivity that matches how you'll actually use it, check for smart home compatibility with your existing ecosystem, and don't sacrifice ANSI Grade 1 durability for the sake of extra features.