Waste of time. Don't go there they will give you lesser compensation than your current. HR will not respond for 1.5 months in my case since I was expecting 40% hike. They should have informed me before my interview.
I applied in-person. The process took 1 day. I interviewed at Kellton (Gurgaon, Haryana) in Mar 2016
Interview
I had 4 rounds, out of which 3 are technical and 1 HR. Overall experience was very good, it was neither too easy nor too tough. They will test your knowledge of the basics not very advanced level questions.
Interview questions [1]
Question 1
Basic iOS question like categories, strong, weak, etc. Aptitude and reasoning questions along with few coding questions also.