Calmer than a five-minute nudge, a quarter-hour beat suits a stretch and screen break, a hydration prompt, or a check-in to see whether a task is still on track. It marks each fifteen minutes out loud so the workday or lesson keeps its shape without anyone minding the clock.
It is frequent enough to matter and spaced enough to stay out of the way, which makes it a comfortable all-morning or all-afternoon setting. Eight reminders cover two hours as set; raise the rounds to span a longer stretch.
A ten-minute beat for rotating tasks and quick checks — a beep every 10 minutes, on repeat, for a desk, a classroom, or the kitchen. Free in your browser, no sign-up.
The interval behind the 20-20-20 eye-rest rule — a beep every 20 minutes, on repeat, to look away from your screen, stretch, or refocus. No account, no install.