I use an app called Clearspace on iOS - it hooks into the screen time API and prompts you with a "breathe in / breathe out" timer before it allows you to unbloc

I use an app called Clearspace on iOS - it hooks into the screen time API and prompts you with a "breathe in / breathe out" timer before it allows you to unblock the app. It also lets you unblock it for a specific configurable time period, and auto-closes the app once that period expires. I found it gives me just enough friction that most of the time, the impulse to open the app passes while I wait for the breath timer to run out. Simply using the OS screen time limit on its own is not really enough, because it's too easy to dismiss and override the block. Having a brief timer to help you consider whether my action is intentional or driven by anxiety or thoughtless boredom really helps.