HR and interviewers were OK. HR was especially responsive.
I was contacted by HR and had a phone interview a week later. The questions covered binary search, BST, and Mergesort. The level was medium.
The next day, I received an invitation for an onsite interview.
I was expecting questions similar to those asked at Google, but I got the impression I was being interviewed by inexperienced developers. The questions were basically too easy, which was a little disappointing.
Basically, no advanced algorithms questions.
The following metrics were computed from 5 interview experiences for the Apple iOS Developer role in United States.
Apple's interview process for their iOS Developer roles in the United States is fairly selective, failing a large portion of engineers who go through it.
Candidates reported having very good feelings for Apple's iOS Developer interview process in United States.