The best smart locks can help anyone who constantly misplaces keys or who frequently wonders whether they locked the front door. Installing a smart lock doesn't mean throwing away your house keys—you probably still want to bring them with you. Don't worry, I've been testing smart locks for nearly a year and have lots of advice in this guide. For more smart home recommendations, read our Best Video Doorbells, Best Outdoor Security Cameras, Best Indoor Security Cameras, and Best Robot Vacuums guides. Before You Buy a Smart Lock AccordionItemContainerButton LargeChevron Here's a few things to check before you purchase a smart lock.