I applied online. I interviewed at Priceline.com in Feb 2017
Interview
1. Phone interview with recruiter.
2. Phone interview. Interviewer talks heavily on OOP and iOS questions.
3. In Person interview. Whiteboard coding and another session will give you a print paper of one of their iOS design such as a TableView. They would want you to explain what's in the picture. Definitely study up your whiteboard coding skills. I had questions that were asked similar to my previous in person Google interview.