PocketMoji is like Duolingo for the JLPT. Short vocabulary, grammar, and kanji practice sessions from N5 to N1. Works offline on iPhone and iPad, with free starter sessions at every level.
GrammarVocabularyJLPT and other testsJLPTJLPT N5JLPT N4JLPT N3JLPT N2JLPT N1