Play is a web application framework based on Java and Scala that brings APIs and components together to simplify your web development. It’s a full-stack framework, which means that you’ll find all the web apps and REST services you need for your project, including a routing mechanism, an integrated HTTP server, and form handling. It also comes with hot reloading, which means you can easily see the output of your code by refreshing it.

A mobile development framework is a software framework that is designed to support mobile app development. It is a software library that provides a fundamental structure to support the development of applications for a specific environment.