Requires a user account setup on NovelRank.com. http:www.novelrank.com/login. phpThis simple app will only ask you for your NovelRank username. Once saved, it will display all the books in your user account. You can touch any of the book's listed to see details about those books across all the Amazon domains they are tracked. The system also allows you to quickly change usernames, for instance to show it another user with their username. The username is stored within the application even if the application is closed, making it quick and easy to load up your book information. This app does not use Android notifications. Track your book's sales rank and get sales estimates from Amazon websites worldwide through NovelRank.com and when you create an account to track multiple books on a single page, then this app will allow to easily see that information on-the-go. http:www.novelrank.com/.