
Espresso is an express delivery tracking app designed with Material Design style, built on MVP(Model-View-Presenter) architecture with RxJava2, Retrofit2, Realm database and ZXing

Express.js is a simple Node.js framework for single, multi-page, and hybrid web applications.
Material Design is a design system developed by Google that provides a set of guidelines, components, and tools for creating visually appealing and functional user interfaces. Material Design is designed to be flexible and customizable, making it a great choice for a wide range of applications and use cases.