It is an intercom app (transceiver app). You can have a conversation between iPhones connected to WiFi. Features ・ One-to-many call ・ One-to-one call ・ Grouping registration ・ In-group calls (you can talk with the same passcode) ・ List of names of callable parties ・ Display of the other partys name ・ Bluetooth headset support ・ Automatic call can be started by detecting voice ・ Voice level adjustment ・ Supports call start sound This app is a full-featured version of MyIntercomLite.