Buying guide
Smart Lock Buying Guide (2026)
How to choose a smart lock: retrofit vs replacement, entry methods, hubs, battery life, security grades, and door measurements.
Retrofit or full replacement
Start with your door and your lease. A retrofit lock like the August keeps your exterior hardware and keys, suits renters, and installs fastest. A full deadbolt replacement like the Schlage or Yale lines adds a keypad or fingerprint reader outside, which is better for households that want code entry at the door. If you rent, the retrofit decision is usually made for you; if you own, choose by entry methods.
Decision framework: buy this type if, avoid if
Buy a retrofit lock if you rent, love your current handles, or want the easiest removal at move-out. Avoid retrofit locks if anyone in the household needs a keypad or fingerprint reader on the door itself. Buy a keypad deadbolt if guests, cleaners, or children need entry without a phone. Buy a fingerprint lock if daily family entry speed matters most. Avoid any lock with no physical fallback unless you are comfortable with battery backup contacts as your only rescue.
Entry methods and who uses them
Map methods to people, not to spec sheets. Children do best with fingerprints or simple codes. Guests do best with scheduled codes. Phone-first adults do best with Home Key or auto-unlock. Anyone without a smartphone needs a code or a key. A lock that covers every person in the household beats a lock with one impressive method and three gaps.
Hubs, Wi-Fi, and battery life
Built-in Wi-Fi means no hub and easy remote control, at the cost of battery life. Bluetooth and Zigbee locks last longer but need a hub or home hub for remote access. Check the Wi-Fi signal at your door before buying a Wi-Fi lock: a weak signal is the most common cause of short battery life and slow app response, and a nearby access point fixes both.
Measurements, grades, and the install check
Measure door thickness, backset, and the clearance around the interior unit before ordering, and check the bore hole size against the lock requirements. Read the BHMA or ANSI grade as your security baseline: Grade 1 is commercial strength, Grade 2 is solid residential, Grade 3 is basic. After install, test the bolt with the door open and closed, align the strike plate until the bolt throws freely, and only then trust auto-lock.
Questions, answered
How much should I spend on a smart lock?
Budget locks like the eufy C220 cover fingerprint and Wi-Fi well, mid-range locks like the Yale Assure Lock 2 and Aqara U100 add polish and platform depth, and premium locks like the Encode Plus and Yale Touch add Home Key or fingerprint at the top end. Spend for entry methods you will use daily, not for features you will set once and forget.
Do I need to replace my whole door hardware?
No. Retrofit locks keep everything outside, and full deadbolts replace only the deadbolt, not handles or hinges. Matching finishes is worth a thought if the new lock sits next to older handles, but function comes first.
Can a smart lock work with my existing alarm or camera?
Often, through the platform rather than the lock itself: Alexa, Google Home, and Apple Home routines can link locking to cameras, lights, and alarms. Check your platform's lock support before buying, since some integrations are read-only and cannot lock or unlock.
How often do smart lock batteries need changing?
Wi-Fi locks typically need fresh batteries several times a year on busy doors, while Zigbee and Bluetooth locks can run for many months. Treat app low-battery warnings as deadlines, keep spares in the house, and replace all batteries at once rather than mixing old and new.