As you can see from the screenshot below, Convert MP4 to MP3 is layed out very simply. No reason to have to hover over a bunch of buttons or reading instructions trying to figure out how to do the exact task the app says it does. I highly recommend this app if you download videos online which more then likely are in a MP4 format. Works great for music videos, video podcasts, or whatever else you can think of.
This app is completely free and free of tag along apps that auto install to your computer. Go download this app at Convert MP4 to MP3.