Retrofitting is easier and uses the existing deadbolt hardware that’s already installed in your door, while replacing is more difficult because you need to completely remove the exterior lock ...

August smart locks are also an excellent retrofit option since Wi-Fi Smart Lock only installs on the inside of the door, leaving your original deadbolt hardware outside. The big thing about August ...

We recommend the Schlage Encode Smart WiFi Deadbolt for its combination of robust hardware, simple installation and controls, top-tier security, and overall reliability. The Yale Approach Lock ...

Hardware-wise, the Yale Conexis L1 lands sure ... seeing how many turns it takes to fully extend the bolt, and gives you a range of options, such as auto locking and a pin to access.