Chess app on Iphone

I have a Iphone 5 and want to play using the chess.com app but that does not work as I can't log in.  My account is connected to Facebook and all I can see is Chess within FB, I can't log in with FB in the chess.com app (which was perfectly allright on my Android phone).  Is there something I need to do in order to make this work?

Other people have reported this issue in the past. If you use the Contact form to write an email to support, they can enable you to log in without Facebook.

You can't save games you have played elsewhere on chess.com or use the chess.com computer analysis on those games.  

As long as you have the pgn score of the game, any engine will help you do a blunder check on the games.