Hi, My bid is only for android app development and complete back end required for it in Php/mysql. I have a very strong experience working with Android and web technologies. However, You need to provide database, hosting, or any other cost like charges for chat sdk, sms gateway (if any included in your app). As far as I am concerned, I will handle Your all concern effectively. You will get honest communication with me. You will get remote support for 2 month post delivery of project. I hope we would be working together soon.