Default [Q] Trying to find a program that will help code

I received this request from a friend and not too sure where to point him :

I would like your help finding information out about how to write apps for the app stores I believe there are programs that can do this for you, also information about how to encrypt an app using SLS 256 bit encryption.

Language preferred is C Plus or Descriptive C is preferred, note that the programming software will do the coding normally

Would like your help as only programming I have touched is Java Script/xhtml/css

Thank you so much