Halff started as a Mac menubar app. Three things changed since then. It runs on iPhone now, Not all productive time is equal, so you can mark the categories that genuinely move your life forward. Those half hours turn gold, and they are the only ones that count toward your daily target. And then there is the Guardian. Pick the apps that eat your day. Set how many gold half hours you owe yourself. Until you hit that number, those apps stay locked, for real, through Screen Time.

A quiet nudge every 30 minutes, on Mac and iPhone. One tap to score your last half hour: value or waste. By evening, you see exactly where your day went. No timers, no forms, no mental load.