Kytabu is a textbook subscription application for both Android tablets and Desktops. The application allows users to access curriculum textbooks locally stored on a microSD encrypted by Kytabu through a mobile payment gateway. The use can rent content in pieces over various timeframes rather than buy the entire book once. This means the use can rent a page, chapter or book for an hour, day, week, month or school term. This drastically reduces the cost of the book as well as making cost more affordable for low and middle income families. The application would be a 'host' application that would run off a tablet or on a destop courtesy of a modem/dongle stick. The tablet or modem would both also come with a SIM card from a local mobile company as the cellular data and mobile payment gateway. This means that if there are any updates on content, the publisher would push content to the user through the cellular data network to the users at the publishers cost. This keeps data access costs low and gives the user updated learning material conveniently.