EV One Communicator Communicator is a user-friendly app (often referred to as a soft client) that runs on the most popular platforms for computers, smartphones and tablets, and delivers all of the EV One functions from a single app. Designed with the user-experience in mind, the EV One Communicator app makes it easy to access telephony features, send and receive IMs, and collaborate with Voice, Video, and Desktop Sharing to improve worker productivity and streamline business operations.