Hi, My Bid is for Complete Android App Development and back end required for it. However, You shall provide database/hosting and charges for extra things like chat sdk or if any paid api like location, sms gateway etc is there or for such kind of services to the respective companies. I have quite a strong knowledge working on Android and web technologies, integrating payment gateways like paypal, payumoney, chat sdks like sendbird and applozic, location based services, firebase , push notification , huge no of file uploads etc etc. You will get honest communication with me. I ensure You an awesome product. I hope we would be working together soon.