RDIO Radio Dakwah Islam Online is a free Android application developed by Syiar Tauhid Inc. It falls under the category of Education and Reference, and is a collection of radio ahlu sunnah. The program offers several features such as the ability to play, record, share recordings, and send questions.

The app is designed to provide users with a platform to listen to different radio stations that fall under the ahlu sunnah category. The program's interface is user-friendly, allowing users to navigate through the app with ease. The app's play feature allows users to listen to their favorite radio stations, while the record feature lets them record and save their preferred programs. Users can also share their recordings with their friends and family via social media platforms. Lastly, the app's send questions feature allows users to send their queries and get responses from the radio hosts.

Overall, RDIO Radio Dakwah Islam Online is a useful application for users who want to listen to ahlu sunnah radio stations and engage with the radio hosts. The app's features make it stand out from other similar apps, and its user-friendly interface makes it easy to use.