Bests & Worsts Reviews from Amazon

I subscribed to Calm Radio about 6 weeks ago, and I love it on my Android phone. I have a Kindle Fire HD7, and I've been using the Calm Radio For Kindle app, and it's sluggish, but worst of all, when the screen is off, the audio keeps glitching. I finally contacted their tech support, who suggested uninstalling and reinstalling. I did. Same problems. HOWEVER, when I installed the other app which is available in the kindle appstore, Calm Radio, which, presumably is not "optimized" for kindle, worked much better!!!!!