This door lock with code can better replace mechanical locks.
If you don't want children or others to enter at will, they will be your good helper, protecting privacy while avoiding embarrassment; 
More intelligent app management If there is no app application, user management is a headache because it is difficult to remember all users,
and it is also difficult to know when they will unlock and enter, or cancel some user permissions according to the situation;
Fingerprint lock and application programs effectively solve this problem;
One app can manage multiple Smart lock
When you change most of the locks in the whole house into Smart lock, you can use one app to add all locks, so you don't need to use different keys.
When a door needs to be normally opened, you can open the passage mode to change the Smart lock into a mechanical lock.