PSA for web developers: if you plug your iPhone into a Mac with a USB-C cable and turn on the iPhone setting "Safari -> Advanced -> Web Inspector" you can run the full Safari web inspector on your Mac against live pages displayed on your phone
Wildly useful, not just for debugging but even for things like tweaking a page a bit in order to get a better screenshot
@simon The same works with Android and Chrome DevTools! It's massively helpful when you need it; that's about two times a year for me but then I really need it!
https://developer.chrome.com/docs/devtools/remote-debugging