Agree with these posters. If a kid picks up the phone, or I leave it on my desk at work, I don't want them to be able to start playing with the door.
I'd like to see a twist on the requests above, though. What I suggest is that the user has the option to set the app to operate in view-only mode until unlocked. That way I can see all the alerts and status. But if I want to operate the door then I need to enter a PIN or use the fingerprint sensor.