Give every person their own code. It is the cheapest meaningful upgrade in home security: you see who comes and goes in real time, and you can shut a code off the moment it should stop working.
The everyone-gets-the-same-code problem
Most households run one code for the whole world: kids, cleaners, the neighbor who waters the plants. That tells you a door opened, and nothing else. Commercial clients solved this decades ago with individual credentials, and the same thinking belongs on a front door.
Codes with names and schedules
A smart lock on the system gives every person their own code, and on locks that support it, codes can keep hours: the cleaning crew's code works Tuesday mornings, the contractor's code ends with the job. Nobody re-keys anything, and nothing gets copied at a hardware store.
Locks as part of the system
On their own, smart locks are a convenience. Tied into the security system and the app, they become part of how the house behaves: the door locks when the alarm arms, unlocking for your code can disarm, and it is all in the same app as the cameras and the thermostat.
Questions we get
Delete them from the app in seconds. That is the entire point, and it beats re-keying a lock every time life changes.
Professional installs tie locks into the security system, whether the lock talks to the panel by radio or over Wi-Fi, instead of leaving them as one more standalone app.
Per-person codes shine on rentals and guest houses: a code per stay, gone at checkout.