Thank you!! We do have Adobe Acrobat DC (the desktop version) installed, so I don't know if that counts for the service.
Thank you for answering my questions.
First, I have been unable to find information on whether the mobile app can do the below: can you add pages, attach images to the PDFs, merge or combine, zip files, copy/paste, and add bookmarks. I haven't been able to perform these tasks within the app myself.