Biometric Door Locks

1. Lock Type - Match Your Security Needs

• Smart Locks (Wi-Fi/Bluetooth): Remote control via smartphone, temporary access codes, activity logs, voice assistant integration. Ideal for tech-savvy homeowners, Airbnb hosts, and modern smart homes. Requires batteries or hardwiring.
• Keypad Locks: PIN code entry without physical keys. Great for families with kids, rental properties, or anyone tired of carrying keys. Simple, reliable, and no smartphone needed.
• Biometric Locks: Fingerprint recognition for keyless entry. Perfect for high-security needs, offices, or households wanting quick access without codes or keys. Stores 50-100+ fingerprints.
• Traditional Mechanical Locks: Physical key-only access. Most affordable, no batteries, proven reliability. Best for those who prefer simplicity or as backup to smart locks.

2. Installation Type - Know Before You Buy

• Retrofit/Deadbolt Replacement: Replaces only the interior mechanism, keeps existing deadbolt and keys. Easiest installation (15-30 min), renter-friendly, no door modification. Most smart locks are retrofit.
• Full Replacement: Replaces entire lock assembly. Requires drilling, may need professional installation ($100-200). Best for new doors or security upgrades.
• DIY-Friendly: Look for locks with simple instructions, included templates, and all hardware. Most modern smart locks can be installed with just a screwdriver.
• Door Compatibility: Measure your door thickness (standard 1-3/8" to 1-3/4"), backset distance (2-3/8" or 2-3/4"), and check if door is metal, wood, or composite.

3. Power Source & Battery Life

• Battery-Powered (4xAA): Most common. Lasts 6-12 months with normal use. Low battery warnings via app or beeping. Keep spare batteries handy.
• Rechargeable (Li-ion): Built-in battery charged via USB-C or micro-USB. Lasts 2-6 months per charge. More eco-friendly but requires remembering to charge.
• Hardwired: Wired to doorbell transformer or home power. Never needs battery replacement. Requires electrical knowledge or pro installation.
• Backup Power Port: Many locks include 9V battery terminal for emergency power if main battery dies. Essential feature for peace of mind.

4. Connectivity & Smart Home Integration

• Wi-Fi Built-In: Direct internet connection for remote access anywhere. Control lock from vacation, grant access to guests remotely. No hub required but uses more battery.
• Bluetooth Only: Control via smartphone within 30-40 feet. More secure, better battery life, but no remote access. Great for local control without internet dependency.
• Hub-Required (Z-Wave/Zigbee): Requires separate smart home hub (SmartThings, Hubitat, etc.). Best for whole-home automation, more reliable than Wi-Fi, but adds complexity and cost.
• Voice Assistants: Check compatibility with Alexa, Google Home, or Apple HomeKit. Enables voice commands like "Alexa, lock the front door" or automation with other devices.

5. Access Methods - Convenience vs Security

• Physical Key Backup: Always recommended. Provides access if batteries die, electronics fail, or you forget codes. Look for locks with this failsafe.
• PIN Codes (Keypad): Create unique codes for family members, guests, or service providers. Best locks offer 20-100 user codes with scheduled access and one-time codes.
• Smartphone App: Unlock via app, manage users, view activity history. Check if app is reliable (read reviews) and if it works offline.
• Fingerprint Scanner: Fast (0.5-1 second unlock), convenient, difficult to share. Accuracy varies - look for 98%+ recognition rate. May struggle with wet or dirty fingers.
• NFC/Key Fob: Tap-to-unlock cards or fobs. Good for people without smartphones or as backup. Can be lost/stolen like physical keys.

6. Essential Security Features

• Auto-Lock: Automatically locks after 30 seconds to 5 minutes. Critical for forgetful household members. Adjustable delay recommended.
• Tamper Alerts: Notifies you if someone tries to force entry, remove the lock, or enters wrong codes repeatedly. Essential for security-conscious users.
• Activity Log: Records every lock/unlock event with timestamp and method (PIN, app, key). Invaluable for monitoring access, especially for rental properties.
• Encryption (AES-128 or higher): Protects wireless communication from hacking. Look for locks with bank-level encryption and secure protocols.
• ANSI/BHMA Grade Rating: Grade 1 (best/commercial), Grade 2 (residential security), Grade 3 (basic). Grade 1 or 2 recommended for exterior doors.

7. Key Features by Use Case

• Airbnb/Rental Properties: Temporary codes, remote management, activity logs, auto-lock. Best: Wi-Fi smart locks with code scheduling and guest access management.
• Families with Kids: PIN codes (no lost keys), auto-lock (they never remember), arrival notifications. Avoid overly complex locks kids can't operate in emergencies.
• Offices/Small Business: Audit trails, scheduled access, user management, tamper alerts. Consider biometric for high security or keypad for employee turnover.
• Elderly or Accessibility: Large, backlit keypad numbers, voice guidance, auto-unlock via geofencing, one-touch locking. Avoid small touchscreens.
• Apartment Renters: Retrofit design (no permanent modification), easy removal, battery-powered, Bluetooth (no Wi-Fi setup). Confirm lease allows smart locks.

Pro Tip: For best security, use multi-factor access (e.g., fingerprint + PIN). Always enable auto-lock and tamper alerts. Test backup methods before relying solely on smart features. Budget $100-150 for quality keypad locks, $200-300 for reliable smart locks with proven track records. Read recent reviews for app reliability and customer support responsiveness.