I can confirm that both Wiim Mini and Wiim Pro works spectacularly well with Amazon Music APP on iOS / Android. WiimMini/WiimPro appears as an Alexa Casting device so in essence your mobile device is a remote control to control the Wiim's. It will play tracks at HD/UltraHD level. I could not be happier. First device I am aware of that allows this capability !I'm hearing good things about the Wiim Mini and upcoming Wiim Pro. I have my bases covered or I would pull the trigger on one.