Door phones with smartphone connection

Mobile app

— this feature means that you can work with the call panel through a smartphone or tablet with a special application installed on it. Such applications are usually released immediately for both the most popular mobile operating systems of our time — Android and iOS; however, it's ok to clarify this point separately. Anyway, control from a mobile device can have very extensive functionality (including even the ability to work via the Internet, in some models); and interacting with the panel through a gadget that you can always keep with you is definitely more convenient than every time you go to the intercom or other stationary equipment.