How to use the online alarm clock
You are halfway through another job when you remember the smoke alarms in the shared corridor of your terrace need checking. An alarm set for 3:18 pm gives you a clear point to break off, collect any keys you need and step outside. It also leaves the rest of the task comfortably before 4:00 pm, rather than letting it drift into the evening.
While you finish what is already in your hands, the alarm page may sit behind another browser tab. Keep its sound permission enabled and check that your volume is high enough to hear from the next room; a background page can be easy to overlook even though its timer continues. If the browser is closed or the phone or computer goes to sleep, the smoke-alarm check will receive no alert, so use a separate alarm if you cannot keep this page running.
A quick trip along the shared corridor is easier without carrying a mug or balancing a late lunch. At this point in the afternoon, finish any drink before 3:18 pm or leave it somewhere stable, and save food that needs attention until after the check. That avoids returning to cold tea, burnt toast or crumbs on communal flooring while your hands are occupied with alarm buttons and doors.
Common questions
Can I change the sound?
Yes, there is a short list of tones to pick from before you press Start. Softer sounds are easy to sleep through, so a firmer bell tends to be the safer choice for anything early in the morning.
Will it still be right when the clocks change?
Yes. It reads your device's local clock, so the move between GMT and BST at the end of March and October is picked up automatically, as long as the computer's date, time and time zone are set correctly.
Can I use this on a phone?
It works in a mobile browser, but phones lock the screen and suspend background tabs far more readily than a laptop does, which can stop the alarm sounding. For anything important, a desktop or a plugged-in laptop is the steadier option.
Does the alarm still work if I close the tab?
No. Everything runs inside this page, so closing the tab — or quitting the browser altogether — ends the countdown there and then. Leaving it open in the background is all it asks, and switching to another tab makes no difference.
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