Now, I know that it seems like a lame app. And I know that there is some controversy over Amazon as a company. (the bookstore killer) However, all that being said this is an extremely useful app that I find myself using all the time!
One of the features of this app that I find so useful is its built in scanner. What this thing enables the user to do is scan anything (books, movies, ect.) and automatically see the price on Amazon.
So, if I am out browsing through a book store and I come across a new hardback book that I am interested in I do not need to wait and go home to find out how much I can save on it by going to amazon. I can easily whip out my iPhone, launch my Amazon app, scan the barcode on the back of the book, and see what the price differential is.
This app also syncs up with your Amazon account! What this means is that if I find a book or movie that I want when I am out but know that I am not going to be able to purchase it for a while I can simply add it to my Wishlist on my iPhone and when I log onto Amazon.com on my computer my wishlist has already been updated with whatever I added to it with my phone.
The app is very useful and I find myself using it a lot of the time. If you don't have it I highly recommend it!