The 4 character limit applies even on the iPad Pro - we don't want people making flashcards that they can only use on some of their devices; we are planning to expand the limit in the future though. > 4 character cards work in other test types like self-graded and multi-choice, just not in fill-in-the-blanks; you can use a filter in Card Filters to use one of those test types on > 4 character cards while using fill-in-the-blanks for 4-character ones.