Custom-Mobile-Organizational Calendar App using Open Source (Owncloud,DAVDROID,etc)

Do not waste your time bidding or initiating chats if you do not understand the details of the project description AND cannot show similar work done. Goal: Create Android/Iphone compatible app that allow members of an organization to view a central calendar maintained within owncloud. (Only Android now) Seeking person skilled with Sabre/DAV and has experiencing delivering a Sabre/DAV (CalDAV, CardDAV and WebDAV) application. I will request to see working web and mobile applications for each. Seeking to create a calendar mobile app that leverages this infrastructure for a cross-platform mobile-driven calendar. Features - OwnCloud is used to store all organizational and calendar data - App has administrator(s) and regular users for ONE organization - Admin and Regular users NEVER directly access OwnCloud - Admin uses App to customize with logo, organization name and colors for organization - Admin uses App for all additions, deletions and edits for calendar content. - App is used by Admin for to automatically or individually authorize users requesting access to the organizational calendar. - Event Calendar -- Calendar has different views (By Month, By Week, By Day, etc) -- Event Identifiers are on the calendar -- Event Identifiers link to event details page (Description, Directions, Photos, User can specify if they will attend?, event picture gallery (users can upload pics)) More features will be added in later phases.