It depends on how the app is written I guess. For example, make a bookmark of this demo PWA app on your homescreen https://airhorner.com. Notice that it opens itself in a full screen mode, no safari controls are shown.

Thanks! that's neat.

I found this:

> Set the apple-mobile-web-app-capable meta tag to yes to turn on standalone mode.

https://developer.apple.com/library/archive/documentation/Ap...

You need to put special markup in your HTML (and maybe some specific JS) for it to behave like an app and hide the tab bar.