The interview process is pretty normal and not very long. First HR interview, then a technical interview with two of the people from the iOS team (one lead developer and one non-lead); if you pass this stage then they will give you an assignment, after you send the assignment, they evaluate it; and if they accept it the recruiter will contact you and make you an offer.

I applied through linkedin and received an assignment to make an iOS app. After spending few days on it and submitting the app, I received an email that they have given an offer to someone. I think it would have been better if there was some communication before sending the take home assignment which could have shown the seriousness for job interview.