recently, many communities have been made by people froom small scale up to big scale, local or international communities scale also. these communities assist their activites including chatting, sharing information and also conferencing between each others as mobile. one kind of tool, for instance yahoo messenger mobile have provided to chat only, expect blackberry device have supported conference feature, but the device is still expensive and it also to create a communication,some requrements mustr be avilable, such as internet connectivity. furthhermore, other problems are the server location placed at abroad and the price (biling) is still expensive for a few people especially for a small community located at the local institution that should be done free of charge. at this constraint, we resolve by constructing a chatting application that run on mobile device, it supports conferencing feature. the implementation of this applicaton uses java programming language, wifi infrastructure and a local server, is such the small community does not need worry about payment alias free of charge and free from internet connectivity problems. the graphic result could be seen at the gambar 16. other advantags are maintaining and managing system easier, secure, also no effect of international bandwidth.