Tubidy is a free online app that's both a free music search engine and MP3 conveter, downloader all in one nice, easy to use website. Tubidy has a long history of helping users find free music on YouTube and few other websites, including the actual MP3 downloader. It finds music in MP3 format and multiple other formats, which it then converts to MP3. All this happens in the background, and you only need to find the video you want to download, and tap it to begin. First - convert to mp3, then download file.