Help with transfer from Android phone (Acrabat) to IPad (Dropbox)

I have used Android since my first phone 20yrs ago.  I have been downloading knitting patterns for 5 yrs on  Adobe Acrabat and my son got me an IPad this Xmas where knitting patterns can be downloaded to an app called KnitCompanion via Dropbox.  I can't find out how to transfer those patterns from Acrabat on my Android phone to Dropbox on my IPad.  Please HELP!