Here is a description of WebView from official documentation:
WebView objects allow you to display web content as part of your activity layout, but lack some of the features of fully-developed browsers. A WebView is useful when you need increased control over the UI and advanced configuration options that will allow you to embed web pages in a specially-designed environment for your app.
Today is the first day that I have known that Kompakt will use WebView, and I am super-happy that Mudita is using WebView for certain situations!