This app can be used to stream music online or download them for offline access. The app supports ads, and they serve it to support musicians for their hard work. You can find even those songs that can never be found in any free legal music downloader apps. Trebel Music app allows streaming as well as download songs legally. Best Free Music Downloader Applications for iPhone and Android 1. Such apps can help you reduce data consumption. Today we will tell about some of the best free music downloader applications for iPhone and Android that you can use to access music files offline. We have already discussed free music apps that you can download on your Android and iOS devices to play music online.