When it comes to app development I would highly recommend Psytech Digi Pvt Ltd.
Sarang leads a very knowledgeable team with strong project management skills. I came to them with an idea and a brief design proposal and they took the project on from there. They were always willing to make minor changes when requested and stayed in regular contact by providing helpful updates throughout the process. Everything was done to a very high standard and the end product turned out exactly as I hoped and envisaged it would.