Buzzback connects your building's callbox to your voice assistants and mobile devices. Use it to buzz your door or to grant access using expirable guest codes. Supports multiple residents so your family or roommates can use Buzzback for their guests as well. Works with any dial-tone based callbox by creating a local telephone number that can be given to your building's management. Sign up with our apps: - iOS: https://appstore.com/buzzback/buzzback - Android: https://play.google.com/store/apps/details?id=io.buzzback