Hiragana Katakana Quiz is an Android application developed by Royalturtle. As the name suggests, it is a simple quiz that helps users practice hiragana and katakana characters, which are the two syllabaries used in the Japanese language.

The app provides an easy and effective way to learn and memorize these characters. It has a quiz mode where users can test their knowledge by selecting the correct character for a given sound. The app also includes a reference sheet that displays all the hiragana and katakana characters, making it easy for users to study and review at their own pace.

Overall, Hiragana Katakana Quiz is a great app for anyone looking to improve their Japanese language skills. It is free to use and provides a simple yet effective way to learn and practice hiragana and katakana characters.