My method: use mobile Safari, and when I need to log in, put "op" in front of the URL (so it looks like "ophttp://" http://" or "ophttps://" https://"). Press E

My method: use mobile Safari, and when I need to log in, put "op" in front of the URL (so it looks like "ophttp://" http://" or "ophttps://" https://"). Press Enter, this launches 1password and points its browser at the URL, ready to autofill.