Ruby on Rails is an open-source web application framework written in the Ruby language. It is designed to make the development process much simpler and faster. It is based on the Model-View-Controller (MVC) architecture, which is a popular architectural pattern used in software engineering. By using this architecture, Rails helps developers create web applications more quickly and more efficiently. Rails is a full-stack framework, meaning it provides support for both the front-end and the back-end of web applications. It is popular for its ease of use and its focus on the development process. It provides developers with useful tools for developing applications quickly and efficiently. It also offers a variety of features, such as database migrations, template engines, and a built-in testing framework. Ruby on Rails is a powerful web application framework that can be used to create high-quality web applications.
Sinatra by no means tries to do all the things RAils does. It is a microframework, not an MVC powerhouse like rails.