Using Readdle people can view electronic books, text files, and even business documents at any place using their iPhone or iPod touch. Readdle features a native interface to navigate and read books when browsing readdle.com from an iPhone or iPod touch and a handy web interface accessible from any Mac or PC that allows users to upload books and documents they want to view from a desktop computer to their Readdle account. Documents uploaded by readers can be divided into custom categories and form private bookshelf which is accessible only by account owner. For people who dont want to register, Readdle features public bookshelf, a collection of classics that is accessible to anyone. The service supports PDF and TXT files as well as MS Word and MS Excel documents, is free to use, and provides 50MB free space for book upload per account. Readdle can work without a regular Internet connection, since the Internet is used only during initial book loading and isnt required later.