After launching a free, ad-sponsored music streaming tier on Echo smart speaker and Alexa devices, Amazon has decided to further expand the service to even more platforms. Starting today, customers who do not have a Prime membership or a subscription to Amazon Music Unlimited can listen to an ad-supported selection of top playlists and thousands of stations for free on their Android and iOS devices.To start using the free tier, you'll have to download the Amazon Music app on your Android or iOS device. Also, Amazon that FireTV devices are compatible with the new free, ad-sponsored music ...