I am using this wonderful app. Nicest innovation of recent times. I carry kindle & Means I carry my whole library with me. In built dictionary ability to mark passages etc. there are too many pluses. In short this a perfect app for reading and don’t want to put in extra bucks for the kindle ebook reader. The app has all the functions and works fine with the cellphone. Drawback I found was I wasn’t able to purchase ebooks from the app itself, rather I had to go on the full desktop site to buy the required ebooks.