Japanese Kanji Hiragana Ruby is an Android app developed by SG Game that aims to help users learn Japanese by providing a tool for reading and writing Kanji. The app is free to use and falls under the Education & Reference category.

This app is designed for those who are learning Japanese but do not know how to read the Japanese Kanji. With Japanese Kanji Hiragana Ruby, users can enter Japanese Kanji in a handwriting keyboard and get the corresponding hiragana. Alternatively, users can also copy and paste the original text, and the app will automatically provide the best ruby. The app includes a feature that allows users to search for their input history and also provides audio pronunciation of the text.