Human Japanese

With the Human Japanese series of comprehensive instructional apps, you'll go from knowing no Japanese at all to reading and writing hiragana, katakana, and even Kanji, while learning grammar and pronunciation. Quizzes, exercises, and games help you retain the skills you've learned, and you can go at your own pace. If you want to learn Japanese, and have fun doing it, this is the best self-study course I know. Available for iOS, Android, Windows, and Mac.