How to use the online alarm clock
Waking at 3:19 pm, you need to get up and be ready to meet the engineer checking your gas boiler. Set the alarm for this time before you drift off again, then use the run-up to 4:00 pm to dress, clear access to the boiler and listen for the doorbell. That keeps a drowsy start from turning into a missed appointment.
While you prepare for the boiler inspection, you may switch to another browser tab without stopping the countdown. Keep this page running in the background and check that your sound is audible; some browsers may restrict an inactive page, particularly when power-saving settings take over. If the browser stops running or the phone goes to sleep, the boiler engineer reminder cannot sound, so use a separate alarm as a backup if missing the visit would cause trouble.
Before the engineer arrives, avoid staring at a bright screen in a dim room while you are still waking. At 3:19 pm, afternoon daylight may be enough to open the curtains and lower the display brightness without making text difficult to read. Place the phone where the alarm remains audible, then look away from it while you make the boiler area accessible and gather any notes about recent faults.
Common questions
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.
What happens if my laptop goes to sleep before 3:19 pm?
The tab sleeps along with it and the alarm will not sound on time, if at all. If you are relying on it, change the power settings so the machine stays awake, or keep a phone alarm running as well.
Do I need an account or an app?
Neither. Choose a time and a sound, press Start, and it runs in this browser tab. Nothing is downloaded, nothing is registered, and closing the page leaves nothing behind on the device.
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