ColourChat:chat,call,draw app for iPhone and iPad

ColourChat is an instant messaging app for not only colorfully chatting or drawing, but also colorfully socializing.
The app is not only an instant messaging(IM) tool of social networking service(SNS), for sending and receiving messages of text, emoji, voice and file (picture, audio, video, Word/Excel/PPT, etc.), chatting peer to peer or in groups, managing the contacts, but also a sharable whiteboard, for drawing anything you want with fingertip or touchpen, sharing pictures or photos, by yourself or with others together.