I always find it strange when people refer to twitter and YouTube etc as apps rather than websites.

That's what they are by now, though. The websites of social media sites are crippled and bug-ridden - try using Instagram in a browser, for example. They want to coerce you into using their apps, because that gives them better tracking opportunities.

That's just what I've been doing after deleting Instagram from my. phone. I can't trust my evening dopamine-seeking behaviour with the phone app, but there's much much less stickiness in the browser.

Have you tried just not using a smartphone? I have a flip phone I take with me and leave my iPhone at home for things that need it. Otherwise, I carry my laptop/tablet everywhere. If I need to check my social media or email I have to sit down and deliberately do that

Tried greyscale yet?

Sometimes. YouTube (and Google Maps, and old.reddit.com but not default reddit) I find to be better on the website than the app.