TECHNICAL SUMMARY:
Cocoa - multithreading, coredata, notifications
ApplicationKit - AddressBook, MapKit, AVFoundation, MessageUI, WebKit, etc
UIKit - GestureRecognizer, StoryBoard, Interface Builder, etc
Frameworks or Api - Xml, JSON, fmdb, wsdl2obj, Rest
Design patterns - MVC, Delegation, Observer, KVC & KVO, Singleton, etc
Source control - SVN, GIT
Report system - Staffload, JIRA, Redmine
Work with binary - Keys, provisions, certificates, create build, predefined parameters, manage application in appstore, configure target