This simple but very effective app lets you stream web radios or any kind of audio stream by simply providing the URL of the stream.
If the stream provides metadata, that will be displayed in the app and in the "Now Playing" section on your iOS device and on CarPlay, along with the station name.
Your station list is synced across all your devices and is securely stored in your iCloud account.
You can change stations just like a real radio by using the previous and next buttons in the iOS "Now Playing" section, on CarPlay, or through your headphones' remote control.