Suggestion for smart door lock

[southsideness]

Hi, I'm looking to replace my porch door Lock and the house's main door lock with a smart lock. I would like to get a suggestion for the right model in terms of security, mobile integration, accessibility ( like using a key, fob, or mobile app), and most importantly what to do when the battery goes down.

At the moment, Main house door lock is of type ( Rim Automatic Deadlatch)
and porch door lock is of type ( Multipoint locking system ). Is there any smart lock that would work for multi-point locking as well?

Thanks for your help