PHONEKEY can do the most of operations offline, you can just pair each member of your family an individual key, these keys allow your family to use independently. However, PHONEKEY provides convenient cloud service, for example:
The Share key is derived from Offline key, it is stored in the cloud service(your account). The owner share the Share Code to a client, the client downloads and installs the Share Key by input assigned Share Code. The client use this Share key to pair with the lock, and then the lock will recognize the client’s mobile phone and allow it to do unlock.
The Share Key can use totally offline. The history record will store in the lock.
Share Key was derived from Offline Key, once the Offline Key disappeared, all the Share Key would be useless.
The Share key can set up period and usage counts limitation.