With Fun With Kanji you are able to learn all common used Japanese characters. All starts with Hiragana, Katakana and their special cases and combinations. After this you learn the Kanji Radicals and then you are ready to start with the 2136 Jōyō-Kanji. You no longer need 4 different apps to learn them!

The app also contains a dictionary and a full-text search over all characters.