It's a widget, not an app! To run, press Menu on the Home screen, then Add/Widgets.
This is an aide for those who study (or want to study) the Japanese alphabets known as hiragana and katakana. It features a set of two app widgets - "Learn Hiragana" and "Learn Katakana". The widgets flash kana characters on your home screen, together with its English reading.
The character changes every 5 minutes.
"Learn Kanji" is coming, too, as a part of our JISHOP project.