Company dijipiji created these great apps:
Hiragana Writing Challenge, Katakana Writing Challenge, Hiragana Bubbles, Katakana Bubbles, Global Tube Adventure, Pure Kanji, Pure Kanji Lite, +?, Hiragana Sunrise, Kanji Bubbles, Hiragana Sea, Katakana Sea, Alphabet Bubbles, Treasures of Japan, rawmeat, Hiragana Krush, Hiragana Run, Totally Natural Skincare, and others..