Mobile App for WordPress Symposium based Website

Hello Freelancers - My client is in need of a mobile App for his members to log into. The website uses WP Symposium - a social media based WordPress plugin where members can follow each other, chat and post information. He is looking for a stream lined app that works both on the apple and android mobile platforms. Members should be able to log in to the site through the App and be able to use all the sites functions just as they would through the web. Please PM me for the website address if required. Thanks, James.