New version with unwanted notifications
Not sure why Amazon would do this as the Kindle app has always been simple and pleasant to use, but the new version now have "notifications" (essentially just in-app spam trying to sell you unrelated books) that you CANNOT turn off (not even via the Notification Center in iOS). So whether you like it or not, Amazon tries to sell you inside the app now.
Tekmologee about
Kindle – Read Books, eBooks, Magazines, Newspapers & Textbooks, v5.12.1