HeavySleeper, a browser alarm for people who sleep through alarms

Field notes

The tool builds a wake-up sequence from a local-time alarm, gradual screen illumination, one of six sounds, optional vibration, and a task. The task can be three short sums or a six-digit code copied from a card placed away from the bed; a second check-in follows after two or five minutes. Its practical boundaries are explicit: the page must remain open, iPhone Safari lacks web vibration, and a conventional alarm remains the recommended backup.