create messenger application like facebook messenger with all features -- 3

Please read carefully and don't pot your proposal if you don't have the requirements and understand the time and price. The project has to be done in 4 days max for demo and 6 days for finishing the full project The project has to be a web, android snd IOS platform The project is to develop a messenger application for our social network which is Thalaa.com. This messager has to be interactive with internal user that are already or will be register in our social network. We have the Design for this project so no need to provide it. We don't have an API for this Project. Th Price is from 400 to 700$ note more.