Company Stickystudy created these great apps:
StickyStudy Japanese Kana (Hiragana & Katakana), StickyStudy Japanese, Japanese JLPT N5 (Vocabulary & Kanji Flashcards), StickyStudy Chinese, StickyStudy: Chinese Lite (HSK Hanzi Flashcards), StickyStudy Flash SRS, Sticky PDF, and others..
