Hi, I am experienced web developer as well as Mobile application developer, Please check my over all freelancer profile, where my 225 satisfied clients reviews. I am ready to build chat application for android, and will be finish this app 20 to 25 days. You need to discuss with me in details and accept my proposal so i can begin work after understand your all requirements, and i hope you will enjoy my services and this job will lead good business relationship with us. Thanks and Regards, Irfan