Interrupt: Muscle-Memory Breaking App Blocker for Doom-Scrollers

I just realised that I'm using my phone and stuff too much while not working towards my goals. How do I absolutely zero my screen time?

The 1-hour limit didn't fail because limits don't work, it failed because "just check messages" is autopilot, not a decision, so your brain taps through the warning without even registering it. That's the real thing to fix, not the hour count. Also aiming for zero screen time is going to backfire, the second you slip once it usually turns into "well I already broke it" and you give up completely. Better target is making the phone harder to open without thinking, not eliminating it, and keeping the social stuff since you said those are real friendships, not something to cut off. Couple things that actually break the autopilot part: delete the app and log out completely so you'd have to type your password every time you want to check it, that extra friction is enough to make it a conscious choice instead of a reflex tap. Greyscale mode also helps more than people expect, scrolling relies a lot on color for the dopamine hit, it gets boring way faster in black and white. Since your schedule's flipped with evening school, "3am" is basically your version of a normal evening, so treat it that way. Before you're allowed to open your phone at that point, do just 10 minutes on one goal thing, olympiad prep, art, whatever. Doesn't need to be productive 10 minutes, just started, momentum usually carries you further once you're in it.