The only blocker
that actually blocks.

Opal is built to be tuned. Deep Focus sessions, custom schedules, strictness levels you dial up or down depending on the day. That flexibility is the whole pitch, and it's also the catch. Every mode you can turn on, you can also turn off, and on the days your willpower runs thin, that's exactly the door you'll walk through.

Fella doesn't give you a door. There's one mode: blocked. You get exactly one 5-minute unlock a day, and it locks itself back up the moment that time is gone. No dashboard to open, no session to end early, nothing to talk yourself into.

Setup follows the same idea. Opal asks you to choose a mode, a schedule, and a strictness level before you can start. Fella asks you to pick your apps, once, then gets out of your way. Both run on Apple's own Screen Time framework, and Fella costs $9.99 a month or $34.99 a year with a 3-day free trial. The technical ceiling is the same. What differs is how much of it you're handed to manage yourself.

No mode-picking. There's no "strict mode" you have to remember to switch on before it's too late, and no softer setting waiting for the day your willpower gives out. Blocking is just how Fella works, every single day, whether you feel strong or not.

A real limit, not a suggestion. One 5-minute unlock a day, and that's it. When it's gone, it's gone. No pleading with yourself for a second round, no quiet exception that turns into a habit. The limit holds even on the nights you don't want it to.

Nothing to configure wrong. Every extra setting is a place to hide from yourself. Fella keeps that list short on purpose, so there's no toggle to loosen, no schedule to quietly bend, and no gap for old habits to slip back through.