If you are looking for a video intercom with access control functions (PIN, Bluetooth, NFC, QR) for an apartment building that only works with a smartphone application, i.e. monitors in the apartments are not required, then IpDoor will be the ideal solution. IpDoor professional IP video intercom system is fully customizable, it provides basic functions and numerous additional functions that can be activated with licenses. Licenses can be perpetual (i.e. purchased only once) or renewed annually.