How to use the online alarm clock
While preparing to check the smoke alarms in the shared corridor of your terrace, set the alarm for 6:25 pm so the job does not slip past you. That gives you a clear prompt before 7:00 pm, with enough time to gather a step stool, tell the neighbours what you are doing, and locate any spare batteries beforehand.
Your corridor check depends on the browser remaining active until the chosen time. If you close this page or quit the browser, the 6:25 pm alarm will not sound; if the phone or computer goes to sleep, it may also miss the moment. Keep the page open and the device awake, with its volume high enough to hear from where you are preparing. A separate phone alarm is a sensible backup if you expect to move away.
Shared corridors can still be noisy at 6:25 pm, when people are coming home, doors are closing, and traffic may be audible along the terrace. Wait for a brief lull before testing each smoke alarm, so you can distinguish its signal and avoid repeating the check unnecessarily. If neighbours are nearby, a quick warning just before the test prevents the sudden sound from being mistaken for an emergency.
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 6:25 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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