I put my phone on permanent focus mode and specifically turn off even notifications from Messages, and I've found this to be super useful for keeping my focus. I see everyone else glancing at notifications all the time.

But even without notifications, I still pick up my phone on my own volition whenever I'm working on something slightly difficult. It's almost a reflex at this point. Something about wanting a little dopamine or even just something to touch and swipe around, which could provide some dopamine on its own.

This website is super useful because I don't even want to touch my phone because I don't want to end the timer. I love it!