It took around one hour. Most question are behaviour based, and some of them are hypothetical. Have some examples in your head before the interview and make sure you go through the app review guidelines as well. Generally, it was a nice interview experience.

Initial phone interview with recruiter, then a phone language vetting. The language vetting process is very boring, and I felt I was talking with a robot, a robot that doesn't have any motion. It was not a difficult interview but very boring, and the interviewer was not engage. Her voice was very dull, and unclear, I couldn't catch what she said over the phone and had to ask her to repeat. I think she got mad after I asked her to repeat her questions several time. By the end of both interviews, both recruiter and the language vetting asked me if I have any question, I asked "how many people are there in the team?" But instead of answered my questions, they said "I can't share this information with you, it's within Apple." Well, I want to know more about the team that I maybe joining later, but it considered as "confidential"? Then I guess there is no way to find out more about the team. The lady who gave me the language vetting was arrogant, I asked her "what the app review process like, do you play the apps and compare with the guideline? she said "we are NOT play the apps, we USE the apps, and OF COURSE we have to USE the app, or how can we communicate back to the developer?!"