Messenger between iPhones, Androids, Symbians and Blackberry. It has a lot of functions. You can drop your location, take a photo, video, send an existing photo and just chat. Created for communication within a network of smartphones. Very comfortably! Intuitive interface. The latest version adds support for group chat. There are push notifications. Works via internet connection. Therefore, those who do not have a permanent connection will be expensive to use. Works great. 
Install from AppStore
