I just made a Home Screen shortcut from the website for InoReader and dragged it to the task bar. When I opened it, instead of launching in Safari, it opened in its own minimal browser window (like what you see when opening a webpage inside third party app), so essentially, it became a web app. Also, I had to log back in, so it seems to be storing its own credentials (I was already logged in on Safari). For this site, this setup is really useful. I tried some other basic content pages and they launched in Safari, so I don’t know if this is a bug or a feature for certain types of webpages. I hope it‘s a feature.