Smart lock types: Deadbolt replacement vs retrofit vs invisible
Deadbolt replacement (August Pro, Yale Assure): Removes old lock, installs new smart lock. Works on all doors. Visible. Most common. $200-400. Retrofit (Level Lock): Hides inside existing deadbolt. Invisible from outside. Keeps original lock appearance. Requires compatible deadbolt ($300-400 total). Best for renters/HOA. Keypad only: No smart features, just PIN code entry. $50-150. Works standalone, no battery concerns. Limited connectivity. Choose deadbolt replacement for most homes. Choose retrofit if concerned about appearance or renting.
Key features and security
Entry methods: Phone app (requires WiFi/Bluetooth range), keypad (local PIN code), fingerprint (biometric), key backup (always have mechanical key). More methods = more convenience. Battery life: 4-12 months on AA batteries (most common). Look for low-battery alerts. Mechanical backup key works if battery dies. Security: 128-bit encryption, two-factor authentication available. All major brands pass security audits. Mechanical key bypass is lowest-security method (anyone with a key can enter). HomeKit vs Alexa vs Google: August supports all. Yale supports HomeKit/Alexa. Level Lock supports HomeKit. Choose based on your smart home ecosystem.
Best smart locks by use case
Renters: Level Lock ($300-400, invisible, no installation complexity). August Smart Lock + Connect Hub ($250-350, works without smart home hub initially). Homeowners: August Pro ($300-400, best integration, battery lasts 12mo), Yale Assure Lock ($300-350, similar to August, slightly cheaper). Budget: Level M1 ($200-250, basic Level Lock alternative). August Wi-Fi Connect ($150-200, entry-level August with WiFi). Premium: Level Lock+ Pro ($400+, fingerprint sensor built-in). August Pro Connect Hub + Seagate WiFi ($400, includes WiFi hub). Best value: August Pro. Works with HomeKit/Alexa/Google, good battery life, wide compatibility.
Installation and HomeKit setup
Deadbolt replacement: Remove old lock (usually 10 screws), install new lock (15 minutes), calibrate in app (2 minutes). No handyman needed. Level Lock: More complex. Requires opening deadbolt, installing Level device inside, reassembling. 30-60 minutes or hire locksmith ($100-200). HomeKit setup: Add lock to HomeKit home in Apple Home app. Create automation rules (lock door at 10 PM, unlock when you arrive, etc.). Allexa/Google: Similar setup in respective apps. Both let you create voice commands and automations.
Battery life and maintenance
Battery: AA batteries last 4-12 months depending on usage (how many times locked/unlocked per day). High-traffic homes change batteries quarterly. Low-battery alerts: App notifies you at 20-30% remaining (2-4 weeks warning). No surprise failures. Maintenance: Lubricate mechanism every 6 months (WD-40). Keep door properly aligned (misalignment causes extra strain). Check battery in spring/fall (twice-yearly routine). Backup power: Mechanical key always works. Some locks support external battery pack (USB-C charger plugged in during outage).