What about files saved to Apple's office suite? You won't find Pages, Numbers, or Keynote apps available for the Android platform. So, if you have files created in these apps, you'll need to export them in a common format. Open a file with the app, tap the Menu button (three dots) on the top right of the screen, and pick Export. Choose either a PDF or Microsoft Office format (both will work fine with the Google Drive, Dropbox, and Microsoft Office apps for Android), then select a save location. If you've installed Google Drive or Dropbox on your iPhone, go ahead and save it there.