A SIP app, short for Session Initiation Protocol application, is a software program that allows users to make and receive voice and video calls over the internet. SIP apps are typically used on smartphones and computers, and they offer a number of advantages over traditional phone calls, including lower cost, better call quality, and more features.
SIP apps have become increasingly popular in recent years as the internet has become faster and more reliable. They are now used by businesses and individuals alike to make calls around the world. Some of the most popular SIP apps include Skype, Zoom, and Google Voice.