How to use the online alarm clock
As you hand over the overnight heating check in an old stone house, an alarm for 1:08 am gives the next person a precise moment to inspect the boiler, radiators and colder rooms. That leaves enough time to pass on any notes before 2:00 am, without turning the change of shift into a vague promise to check later.
For this handover, the alarm needs to remain available in the browser until it sounds. Closing the page or browser means the heating check will receive no alert, and a sleeping phone or laptop may also stay silent. Keeping the page open, the sound turned up and the charger connected makes the arrangement clearer for whoever has taken responsibility.
Before leaving the next person to inspect the house at 1:08 am, mention whether the outdoor air feels damp, dry or unusually misty. Humidity can make old stone walls and window reveals feel colder, while a brief look outside may explain fresh condensation near doors or single-glazed panes. A torch by the entrance and a warm layer nearby help keep the inspection short during the night.
Common questions
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.
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.
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