This new app features a new calendar function. ‘1+1’ features activities of one people with one group.The pigeon icon of this app  symbolize delivering of message. People can create an activity any time you want and invite your friends to join it. When the invitation is accepted, the details of the activity will synchronize on your smartphone. After event, it does not be over, you can share your photo or comment inside you app. It will become your common daily.