I have the AUGUST lock on my home in the north
August Home | Smart Door Locks and Accessories
The one thing i dont like about it, it needs to search for the hub to connect to the web, so the 4AA batteries last about 4 to 6 months. So if i need to unlock, and i forgot to change the batteries, i may be SOL.
I would think all iPhone enabled locks have the same issue. In TV, I have a YALE lock, that I can program codes into. I always have 1 throw away code, in case someone needs to get in.