iOS Developer

Hi All

I am looking for a FULL TIME iOS and possibly Android Developer to help join my team

The first app will be like Tinder except this will be based on a different niche and interest.

A few things I need to ask from you is,
-How long will it take roughly to build an app like that?
-Can you deliver to both android and iOS?
-What support will you offer?
-What do you charge to keep it updated when new iOS gets released.
-Total estimated cost

I am looking for a Christmas release on this project but I have more in the new year

Thanks

Paul