A free program for Android, by SmartApps38.

Are you looking for a way to enjoy your music on multiple devices? Are you tired of having to download music every time to convert it to another format to be able to listen to it on your mobile phone? If you answered yes to any of these questions, then this app will help you. This app allows you to convert your music from the M4A/M4B/M4P format to the MP3 format. It is compatible with most devices and is very easy to use. It works offline, there is no need to connect to the Internet. You can select multiple files to convert and save the results on your device.