Wow, that is a fantastic idea. Basically interrupting the instant gratification loop by just enough to let the more rational mind get a word in.
Another tool that I've found to be incredibly helpful for breaking app-addition is the colorblind accessibility tool. You can use it to make the entire phone greyscale, which entirely defeats a huge range of techniques that apps and feeds use to draw your attention. Tiktok in greyscale I would estimate is 1/10th as likely to pull me into a 5+ minute video binge vs the full color version. And 1/100th as likely to pull me into a 90+ minute video binge (which unfortunately does happen to me in full color).
> You can use it to make the entire phone greyscale, which entirely defeats a huge range of techniques that apps and feeds use to draw your attention
As a counter-anecdata: I've had my phone in greyscale for a few years now. At first it worked amazingly, made me hate my phone and pickups dropped significantly. But over time I realized "Oh wait, 90% of my phone use is text and this is actually super nice for reading".
Now I use my phone just as much as before, except in greyscale.