You can export and save your references in RIS format and then import it to Mendeley or Zotero. If you have created groups in your EndNote library, we advise you to export your references group by group so that you don't lose your groupings when exporting to Mendeley or Zotero.
EndNote only provides mobile apps for iOS. For the basic features, please refer to the official guide.
For in-text citation, EndNote for iOS only allows inserting temporary citation in a Word document. You still need to complete the in-text citation and bibliography by Cite-While-You-Write in MS Word installed via EndNote desktop or EndNote Web.