Hacker News Reader

Guessing you're thinking of https://archive.today?

That gives you a web page where you can give the full URL to the paywalled one, and it'll give back an "https://archive.xx/address" URL where you can see the full thing.

eg: https://archive.vn/0ikco in this instance

I use DuckDuckGo's iOS browser. If you use it's Clear Data functionality, most sites will display the article (because they think you're a first-time visitor).

You're thinking of Outline.com

Yes! This is what I was looking for.

https://sci-hub.tw?

I couldn't get it to work with authors post, but first time I am hearing of this site. Thank you for sharing!