kikubonキクボン -朗読オーディオブック- is a free audiobook app developed by RRJ Inc. The app offers a wide range of audiobooks that can be listened to for free. The app provides an extensive collection of audiobooks, including science fiction, mystery, and fantasy, all of which are narrated by professional voice actors and narrators. The app also features background playback, allowing users to browse the internet or perform other tasks while listening to audiobooks. Additionally, users can download their favorite works and listen to them offline, making it easy to enjoy them on the go. The app has a search function that allows users to search for books by title, author, or narrator. The app also provides features such as 10-second fast-forward and rewind, playback speed adjustment, and booklist management. The app also offers a paid service that allows users to purchase audiobooks. However, users can still enjoy free content, including author and voice actor interviews, that are exclusive to the app. Please note that users must register for a free membership to use the app.