The principle is explained to you, but it's not the same as servlets and applets in java, everything works differently there. Here's a whole article devoted to understanding the types of mobile application development web, nativ vs hybrid owlab.group/our-blog/post/a-guide-to-mobile-app-d… this article will help you understand everything, so you can decide what type of application development you will need and what type will solve all your business processes