It is open source, under MIT License. The documentation is excellent, from framework creators and the NodeJS developers community, with many examples and explained real-case solutions. The middleware and routes give a chance to create a clean structure from the code perspective. The performance is outstanding.

Express.js is very simple and versatile, easy to get started, and the implementations with Express.js are endless. From scaling the endpoints to CPU usage and managing the pods, nothing better than Express.js

The best thing about Mobile Angular UI is that it is made on the AngularJS JavaScript library which is a worldwide accepted library managed by Google. There are so many UI components being provided by Mobile Angular UI which makes development easy and speedy.