Radio Online is an Android app that allows you to listen to a variety of radio stations from all around the world. With over 1,000 radio station options, you can find stations from different genres, including AM, FM, and web radio from Brazil and other countries. The app is free and does not require any registration.

The interface is simple and intuitive, with various features to enhance your listening experience. One of these features is the "Sleep Mode," which allows you to fall asleep while listening to your favorite radio station without worrying about your data or battery. The app automatically closes itself when the time is up.

You can also save your favorite radio stations and customize the app's color to your liking. Overall, Radio Online is a great app for those who love listening to radio stations worldwide, and it is available for free on the Google Play Store.