Webview
Android is the most popular computing platform, and it offers "Webview," which had previously been based on Apple Webkit/KDE Konqueror KHTML, but was forked and diverted by Google beginning with Android Lollipop.
Any application can call Webview to render remote or local HTML. There are dozens of browsers that do this in differing ways, and likely hundreds or thousands of apps that do this for specific uses that are not part of their core function.
Windows also does something similar with the historical "Trident" rendering engine, but is now done with EdgeHTML on Windows 10.
Biting the hand that feeds IT
