ConnectApps is a free iPhone app that allows users to make phone calls to their friends without incurring call charges. As long as there is an internet connection, users can connect with their friends anytime and anywhere using ConnectApps. The app's usage is straightforward - users can create a room and wait for friends to join, or simply enter a room created by a friend to start talking. Its simplicity makes it accessible for anyone to use.

Users should take responsibility for managing the password when creating a room. Additionally, the quality of calls may vary depending on the internet connection.