More power to you, but I don't understand the psychology of this kind of thing. If I have enough willpower to block a feature why not just use that will power to shut off the app after a while? I understand you're saying it's addictive, but if I were addicted to something then I'm going to be inclined to just remove the blocker.
Anyway, this isn't a critique of your work, just my personal perspective.
Anyway, this isn't a critique of your work, just my personal perspective.