Keyless Entry Changes How You Think About Home Security
A smart lock eliminates fumbling for keys, lets you grant temporary access to guests and service providers, alerts you when someone enters, and auto-locks behind you so you never worry about whether you remembered to lock the door. After testing three leading smart locks across security features, installation ease, and daily reliability, here is our recommendation for every household.
Yale Assure Lock 2: Best Overall ($249)
The Yale Assure Lock 2 is the most modular smart lock available. The base lock accepts interchangeable network modules: Wi-Fi for standalone operation, Bluetooth for phone-only control, Matter-over-Thread for smart home integration, or a Z-Wave module for legacy hubs. This means you can start with Bluetooth and upgrade to Matter later without replacing the entire lock. The touchscreen keypad supports up to 250 unique access codes, each assignable to specific time windows, perfect for Airbnb hosts, dog walkers, or housekeepers.
The DoorSense sensor detects whether your door is truly closed and locked versus just locked with the door ajar, an important distinction most smart locks miss. Auto-lock triggers after a configurable delay, and auto-unlock detects your phone approaching to unlock before you reach the door. The Yale Access app provides detailed access logs showing who entered and when. Installation replaces only the interior side of your existing deadbolt, keeping your exterior hardware and keys intact as a backup. Battery life on 4 AA batteries lasts approximately 9-12 months with typical use.
Schlage Encode Plus: Best Built-In Security ($299)
Schlage has been making locks for over 100 years, and the Encode Plus reflects that heritage in build quality. The ANSI/BHMA Grade 1 security rating is the highest available for residential locks, meaning it has passed the most rigorous tests for forced entry, key security, and durability. The built-in alarm sensor triggers an audible alert if someone attempts to tamper with the lock or force entry.
Apple Home Key support lets iPhone and Apple Watch users unlock with a tap, the same way you use Apple Pay. This is the fastest unlock method available: just hold your phone or watch near the lock and it opens in under a second without launching an app. The Schlage Home app and built-in Wi-Fi provide remote access, guest codes, activity monitoring, and integration with Alexa and Google Assistant. The keypad design uses a rotating number sequence to prevent code detection from fingerprint smudges on the touchscreen.
August Wi-Fi Smart Lock 4th Gen: Best Retrofit ($199)
The August lock is unique in that it attaches over your existing deadbolt thumbturn on the interior side only. Your exterior deadbolt looks completely unchanged, you keep all your existing keys, and installation takes 10 minutes with no tools. This makes it ideal for renters or anyone who wants smart lock features without modifying their door hardware. The compact design is the smallest smart lock available, barely larger than a standard thumbturn.
The Wi-Fi connectivity provides remote lock and unlock, auto-lock, auto-unlock based on phone GPS, guest access through the August app, and integration with Alexa, Google, and Apple HomeKit. DoorSense detects door open and close status. The August app provides the best guest access experience: send a link via text or email, the recipient installs the app, and they have temporary access during the window you specify. Battery life on CR123 batteries lasts 3-6 months depending on usage frequency.
Security Considerations
All three locks maintain physical key backup, meaning a dead battery never locks you out. Wireless communication is encrypted (AES-128 or AES-256), and all three manufacturers have responded promptly to any disclosed vulnerabilities with firmware updates. The biggest real-world security risk with smart locks is not hacking but poor access code management: change codes regularly, remove access for former guests and service providers promptly, and use unique codes for each person so the access log is meaningful.
Our Recommendation
For the most versatile smart lock with modular upgradability: Yale Assure Lock 2. For the highest physical security rating with Apple Home Key: Schlage Encode Plus. For the easiest installation that preserves your existing hardware: August Wi-Fi Smart Lock.
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