You can learn the colored position of the radicals (parts) that make up the kanji together with their radical numbers and meanings. The kanjis that contain each part, and the colorful animations of the kanji accelerate your learning pace.

To reactivate the well-known kanji, go to the Parts History page and tap the radicals for a while to delete them from the history. Deleted radicals come again as question(s) in the Quiz.