Generally, apps with FM names are radio apps. The relatively easy-to-use and multi-functional radio apps include Himalayan FM, Yishan FM, Dragonfly FM, Litchi FM and so on.

The full name of MP3 is Audio Layer iii of Moving Picture Experts Group. This is a popular digital audio coding and lossy compression format. It aims to greatly reduce the amount of audio data, but for most users, the sound quality of playback has not decreased significantly compared with the original uncompressed audio.