Vigil
Digits stream for ninety seconds and you tap every single one — except the 3. That’s the whole trap: the tapping goes automatic, and the withhold is where focus lives. A browser short form of the sustained attention task vigilance researchers have used since the nineties. Find ninety undisturbed seconds first — a hidden tab abandons the run.
Vigil
Digits stream for 83 seconds. Tap every digit EXCEPT the 3. That's it. That's the trap.
A game score is not an attention assessment, and this one doesn’t pretend to be — if focus is a genuine daily struggle, that conversation belongs with a professional, not a digit stream. For everyone else: sustained attention is the first thing sleep debt eats and one of the things slow breathing measurably steadies, which is why the sleep calculator and the breathwork guide are next door. Then try Switch or head back to the Lab.