Hi, I'm Nathan.Sorry to hear that you're having trouble, but I'll do my best to help you. Please give me a few moments to review your details here.
You actually have a Barnes & Noble Nook. Kindle is a different product from Amazon.
There is no ring app available for the nook, those nooks are quite limited in the applications they can run.
As of right now it isn't even supported on the better quality kindles.
If you have a computer running windows 10, there is an app for that, and also for iphones and ipads.
My apologies for the news,
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