The Nuki Smart Lock is the best retrofit smart lock currently available for people who want a minimalist, feature-packed upgrade to their preexisting deadlock. It’s currently selling for $149 at Amazon — its cheapest price ever — during the Big Spring Sale. Its fast unlocking speed, Matter-over-Thread support, and broad smart home compatibility impressed my colleague Jennifer Pattison Tuohy, enough for her to consider it the most advanced model she’s tested in her review. Nuki Smart Lock The Nuki Smart Lock makes it easy to upgrade your home security system without replacing your entire lock. It installs in minutes and can even sense when you’re approaching, automatically unlocking the door for you. It supports every major smart home platform through Matter, and you can easily share digital access with friends or family — perfect for when you’re on vacation and need someone to water the plants. Where to Buy: $199 $149 at Amazon The Nuki Smart Lock’s pricing history is a bit confusi