Gridded 5.0.2

Gridded is a free flashcard system specifically designed for learning languages. The app has a uniquely visual spaced repetition system that allows you to see at a glance, based on the hues of your flashcards, which cards need reviewing and how long before each card next needs to be reviewed. The app includes editing tools for consolidating groups of flashcards from multiple sources and dealing with differences and discrepancies between those sources.