OpenKJ Songbook is a free Android app developed by OpenKJ Project, under the Lifestyle category. The app allows singers to search and submit songs to the KJs using the OpenKJ Songbook cloud service. With this app, you can access the okjsongbook.com karaoke songbook from your mobile device.

The app's user interface is simple and easy to navigate. It has a search bar on the home screen that allows you to search for songs by title, artist, or keyword. You can also filter the search results by language or genre. Once you find the song you want to sing, you can submit it to the KJ directly from the app.