Build a Website

- authentication system (login) - user management system 4 similar data entries. (each period possibly about 10-20 fields to fill) - data entry via web interface (can also be uploaded using excel) - tables and graphing on mobile. - mandatory - minimum data entry tables are shown in webapp for entry and for view - multiplatform support for iOS and Android. Let me know if Native, can also use html5 flavors like sencha, titanium, etc - UI designed well. Easy backend management,