For doors with no deadbolt, the Schlage Encode Smart WiFi Lever is a doorknob replacement lock that shares the same attractive features as our top pick ... tape to keep the outdoor housing ...

Should you add the Yale Assure Lock 2 or Lockly Vision Elite to your door? Here's a look at these two smart locks.

There are advantages and disadvantages to both, which we cover in our "what to look for when buying a smart lock" section, and both types can be found among our top picks.