Hi There,
I have read your work description, checked the URL and completely understood that you need to " Modify the existing iOS App".
Relevant Skills and Experience
I am an experienced iOS developer and have solid experience in Facebook, Twitter, Youtube, Flicker, Instagram integration, Push Notification, Local Notification, Events, UrbanAirShip, etc.
Proposed Milestones
$250 NZD - Modify an App
Kindly tell that you need to integrate Facebook, the Twitter link also.