There's no a single IoT device available that I would want to install in my home, let alone a lock. I can understand the need for IoT device in industry, such as remote monitoring of device in the field. For home use I have yet to see a device that make any sense. IoT is at this point complete marketing hype, and very little practical application.
Slightly off-topic but I have a thermostat that only turns on when my phone (or me) is on the way home and it automatically turns it off when I leave my home.
It saves me _considerable_ amount on my heating bill, especially since I'm not home on a regular schedule and often don't know until hours in advance.