They took the interview in 3 round. First round was telephonic..they have asked questions related to ios and objective c basic concepts. Second round was again technical via skype. They were mainly focused in Operation Queue and memory management related questions. Also asked me to write a program to check whether a given string is IP address or not. Both the rounds went good. Lat was HR round again skype. They were not ready to pay what I have asked, after few negotiations they agreed to offer the same. Don't forget to negotiate..:)