The price of about 4.00 for the available there Encore version is simply a joke.
The Amazon app does not seem to be the latest, but the price is here in order. It works as it should and I'm going on the banners.
Supplement 3.2.13: That was a special offer for 0.99 cents - now the price is almost as high as in the Play Store. Lucky, I say as only. :-)