The main difference between the two is that React Native is a framework, while ReactJS is considered a Javascript library that you can use in the development of your website.
With Python, you can solve entire problems in less time and with fewer lines of code. This language facilitates many processes with its simple application.
An application's data is stored on the server-side and then output to the client-side. This side of the server in an application or website is known as the Backend.
Ruby is a programming language that has made its way into the favoritism of developers, managing to cement its position as one of the most used when writing custom web applications.