That doesn't make any sense, how I'm suppose to do my personal budgeting?

And by the way you can screenshot in a browser.

It doesn't have to make any sense, banking "consultants" have put blocking screenshots in their "security requirements" and now all of them block screenshots.

You wouldn't want to risk being non-compliance when a breach happens would you?

Well its my phone my account why can't I take screenshots?

Literally something I regularly need to take screenshots of for payment confirmations etc.

I use my tablet for that, i.e. by taking pictures of the screen of my phone.