Cloud Database Implementation in Digital Libraries Based on Android and JS Client Djamaludin 1 , Mohammad Ridwan 2 , Naufal Hidayat 3 {djamaludin@unis.ac.id 1 , mridwan@unis.ac.id 2 , naufal.hidayat9h@gmail.com 3 } Informatics Engineering Study Program, Islamic University of Sheikh Yusuf Tangerang, St. Maulana Yusuf Tangerang 15118, Indonesia 1,2,3 Abstract. With this rapid development, people, especially students, tend to spend more time just playing Android smartphones and not utilizing technological developments to create something useful but only for playing games, accessing social media and chatting that tend to be less useful. Digital Library is an application that can help students to be able to read books anytime and anywhere without having to come directly to the library, this application is built with the Android platform as an information page while for administrators using the JS Client. We use the Firebase cloud database for realtime data storage . Keyword: smartphone, android, ebook, Digital Library 1. Introduction The development of Cloud Computing Technology in the millennial era that continues to grow and develop so fast, even every day is always growing new innovations to break a change. According to Erik Kurniawan "Definition of Cloud Computing is a model that allows for ubiquitous (wherever and whenever), convenient, on-demand network access to computing resources (for example: networks, servers, storage, applications, and services) that can be quickly released or added. Cloud Computing as an information technology service that can be utilized by users with a network / internet based. Where a resource, software, information and application is provided for use by other computers that need it. Cloud computing has two words Cloud and Computing. Cloud which means the internet itself and computing is a computational process "[2]. With this rapid development, people, especially students, tend to spend more time just playing Android smartphones and not utilizing technological developments to create something useful but only for playing games, accessing social media and chatting that tend to be less useful and coupled with a lack of interest in reading books even though books are an important means for students to add insight and reference for learning. Students at the Shaykh Yusuf Islamic University (UNIS) chose to go to the library to find books and look for references for their final project but the library cannot be accessed every day due to various factors such as holidays, or national holidays so students at UNIS cannot visit them. Some examples of research that previously existed are Researchers by Agung Wahyudi "Development of an Android-Based Digital Library Using the Scrum ICSET 2019, November 23, Jakarta, Indonesia Copyright © 2020 EAI DOI 10.4108/eai.23-11-2019.2301578