@Antiqueight The one I think of as convenient is the setup we had in Beaverton, with an August smart lock controlling a deadbolt. The august attached to the inside meant that locking and unlocking was done by just turning a large circle, and it could lock automatically. And, of course, unlock using my iPhone.
I know I can get an inside knob for the locking, so I don't have to rely on a key to open the door, but I also want all the rest, including automatic locking.