Code Hub is a free learning app that provides an in-depth introduction to the fundamentals of HTML, CSS, and JavaScript programming. The app is intended for beginners and is a self-learning program. There are 50 lessons and four chapters in the app.

The app is divided into the following sections:

HTML - The basics of HTML, including elements, attributes, and tags. 

CSS - The basics of CSS, including the styles of CSS, the layout of a website, and web design. 

JavaScript - The basics of JavaScript, including the types of programming languages, variables, functions, classes, and objects. 

You can also ask doubts in the forum, and get answers from experts in the field.

Code Hub is the best way to learn to program through your mother tongue.