Some apps will save the text of the webpage in your account, while others just strip everything but the text on the webpage.

If you want to ensure the article you are reading doesn't succumb to link rot, using this method ensures you'll still have the article.

Alternatively, using Firefox Reader Mode, Vivaldi Reader Mode or Safari's Reader Mode, you can email yourself the text of the article and access it anytime through your email. You can create a folder or label to organize them!