Also nice how the built-in Iphone calculator app is plain and simple in portrait mode, and rivals a scientific calculator when rotated to landscape mode.
I almost never hold my phone in landscape.
It’s not just Apple, though: there’s a whole page of useful settings for Instagram’s Hyperlapse app. Guess how you open it? You tap the screen four times with four fingers. Why on earth did they build and maintain a settings page and then hide it like that?