FM radio is an over-the-air analog signal being broadcast in your local area. It is limited in range, but usually sounds better than audio streamed over the Internet. In FM Mode, NextRadio delivers images and interactive content in sync with FM radio broadcasts and uses much less data than streaming radio. Your battery will last a lot longer, too.
NextRadio now has a Streaming Mode which allows you to listen on devices that aren't FM-enabled, listen to stations outside your local area, and send the audio over Bluetooth. Like other streaming apps, Streaming Mode will use more data and deplete your battery more quickly.