CallAll is the easiest way to talk to many friends on the phone at the same time. Simply download the app, select up to five contacts from the address book and start the telephone conference. You don’t have to register for CallAll, and there are no monthly charges. With the clear and concise design, it’s very easy to reach your friends spontaneously. You can also save individual groups with names and pictures and quickly get them all on the phone again for the next call.