Video door–phone (also known as video door entry or video intercom) is an analogue or IP intercom system, used to manage calls made at the entrance to a building (residential complex, detached family home, workplace, etc.) to indoor monitors/mobile devices/computers providing audiovisual communication between the caller and the recipient. Krypto uses state of the art technologies that can combine all worlds of video door entry/access control/ Airbnb management into one unique solution.