If the app has a mobile site, log in to it on a browser you've installed only to run webapps (rather than search queries, clicked links, etc) and don't add a PWA or bookmark. Put an anki or Duolingo or Wikipedia icon where the app used to be in your home screen. I can still go to Twitter or HN if I want to but this is enough friction that I spend my time differently.
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If the app has a mobile site, log in to it on a browser you've installed only to run webapps (rather than search queries, clicked links, etc) and don't add a PWA or bookmark. Put an anki or Duolingo or Wikipedia icon where the app used to be in your home screen. I can still go to Twitter or HN if I want to but this is enough friction that I spend my time differently.