Anki is the free and open-source flashcard program using spaced repetition How I work with anki using Org mode:

Anki-editor - plugin conversion from orgmode files to the Anki markup.

Anki-connect - plugin to communicate with ankiweb.

Minimize to tray - allows to start anki minimized

How to setup anki to use it in org files:

(use-package anki-editor
  :after org
  :config
  ; I like making decks
  (setq anki-editor-create-decks 't))

(map! :leader
      :map org-mode-map
      (:prefix ("a" . "Anki")
        :desc "Push" "p" 'anki-editor-push-notes
        :desc "Retry" "r" 'anki-editor-retry-failure-notes
        :desc "Insert" "n" 'anki-editor-insert-note
        (:prefix ("c" . "Cloze")
          :desc "Dwim" "d" 'anki-editor-cloze-dwim
          :desc "Region" "r" 'anki-editor-cloze-region
          )
        )
 )

Inspired by:

https://rgoswami.me/posts/anki-decks-orgmode/ https://yiufung.net/post/anki-org/