Best app I've tried for learning kanji – Learn Japanese! - Kanji Review

Keeps my interest. The use of repetition, and switching back & forth btw English & Japanese audio, kana and romaji really helps the kanji "stick". It's totally worth buying the whole pack of lessons; it's a steal for under $10. If it only had writing practice as well as reading, it'd be perfect!
Review by kheitl on Learn Japanese! - Kanji.