Smashwords now requires all erotica authors to categorize and certify content in their books because of the restrictions that B&N, iBooks, and the other book retailers have enacted. So, I've moved my books exclusively to Amazon. It was a hard decision to make, but I would have been banned from the other retailers sooner or later, so I just took the proactive step before that happened. I hope y'all can understand and not be too angry at me. The Kindle app works on pretty much any device, as far as I'm aware.
If you have any problems getting my books, message me and I'll try and help you out!