Set the timer to 210 minutes

Online timer for 210 minutes

While the reception area hums around you, a three-hour-and-thirty-minute countdown lets you read, answer messages or finish quiet work without repeatedly checking the clock. It suits a long appointment wait when your attention is divided between what you are doing and the possibility that your name will be called. Keep the phone somewhere visible rather than buried in a bag.

During an extended wait at a clinic or service centre, closing the timer tab or the browser may stop the countdown or prevent its alert from reaching you. Switching briefly to another app is less disruptive, but phone settings can still restrict activity in the background. If you need to complete focused work, leave the browser open, avoid clearing it from recent apps, and note the expected finish time as a backup.

As the waiting room fills and you settle into a task, nearby conversations, televisions and reception announcements can mask the ending sound. Set a volume that remains noticeable without disturbing everyone else, and keep vibration enabled if your phone allows it. Headphones may make the signal clearer, though wearing both earbuds could mean missing the receptionist, so one ear free is a practical compromise.