Once you have the measurements for your door and are ready to lock it in place, it's recommended to level the door with a ¼ or ⅛ of an inch gap between the door and its frame. A gap around this ...

The $99 SwitchBot Lock is the first smart door lock I’ve tested that doesn’t replace any part of your existing lock. Instead, it attaches to the back of your door over the top of the thumb turn.

After 40 hours of research and interviews with locksmiths and security experts, the Schlage B60N deadbolt is the best door lock for most homes.

These smart locks make it easy to bring your door online and manage it from anywhere. After testing the best smart locks on the market, these are my favorites.