At first this app was excellent, now it is nearly useless. For some reason I had to reload all of my music and now It shuts down or freezes up constantly. Trouble Shooting guide was no help. I tried refreshing my music and even deleting and reinstalling the app. I've been paying for Amazon Unlimited but I'm about ready to delete the app. Unfortunately I'll be loosing an extensive library of music that took a long time to collect.