Very flexible

This is a very flexible app. I have three different decks now. I can study one in intense short mode till I know those then switch that deck to spaced interval, while keeping others in spaced interval. While I am studying decks in spaced interval I can add new words/kanji/grammar and get short intense period with the new card then it joins my existing cards on spaced interval.

Ryuu Tokyo about Flashcards Deluxe, v3.3