ReactJS is one of the most popular ways to develop web apps. It makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes.
For mobile apps, React suggests using React Native. It’s highly optimized for mobile devices and requires a separate code base for your app.
Using VoltBuilder, you can make your ReactJS apps into native mobile apps, using the same code base as your desktop version. All functionality is retained - the app will have the same look and feel as the desktop.