What can I get about users device information

What information about users device I can get for marketing in future?
I'm new about swift and my knowledges is not well but before I have been working with PHP + JavaScript on web development and I can get about user PC: IP, Local languages ​​on browser, Time zone user in PC with time user, Location if user agree, counts visits pages with cookie or session, size browser window and etc.

I mean what information I can accumulate about user for then send to my server with asking

  1. about agree themeself
  2. without agree themeself


This is off-topic for these forums.

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