In this cross-platform project that was developed for both iOS and Android, lots of effort and expertise have been implemented to take the least amount of server resources. This project is an online bookshelf that consists of paid and free books. Both audiobooks and textbooks have been considered. In this project, the users’ ease of reading was the number one goal for the development team. The team consisted of two senior back-end developers and one front-end developer. This app was downloaded and installed more than 120k times.