Build a simple File Transfer Andriod App -- 2

We need simple file transfer andriod app similar to Shareit. The User Interface have to be simple, attractive and hassle free. There should not be any restriction on file size. The app should not require Internet connection to work for the User. Rest details later when your bid is accepted. We have number of projects in pipeline and if we like any developer then he/she should expect more work from us..