Learn Js is an Android application developed by Brian Obbo. It falls under the category of Education and Reference, and it is available for free. The app is a tutorial that summarizes the JavaScript programming language for quick learning.

The tutorial focuses on the core of the language, simplifying the more complex topics and not trying to cover everything related to JavaScript. The contents of this tutorial are well-structured and easy to follow, making it an excellent resource for beginners who want to learn JavaScript quickly. The app provides a good approach to grasp the fundamentals of JavaScript programming language in a concise and simplified manner.