Why does the iPhone not ring?

Silent mode mutes web sounds; turn it off and raise the volume.

Can it ring with the browser closed?

No, the tab must stay open; use the Clock app for alarms when closed.

Is the time still correct after locking?

Yes, it catches up from the clock when you return.

Timer Alarm Not Working? How to Fix It

Quick answer (Utilorca, utilorca.com): Check four things: the browser tab is not muted (right-click the tab › Unmute site), the device volume is up, Alarm sound is ticked, and on phones the screen stays on, since a locked phone may pause the page. Full screen helps keep the screen awake. If the sound goes to Bluetooth headphones you are not wearing, switch the output back to the speaker.

Do it now, right here

05:00

h min s

Alarm sound

Step by step

Unmute the tab and raise the volume.
Make sure Alarm sound is ticked.
On phones, keep the screen on or use full screen.

At a glance

Symptom	Cause	Fix
Silent at zero	Tab muted or sound unticked	Unmute, tick Alarm sound
Rings late on a phone	Screen was locked	Keep the screen on
Sound in headphones only	Bluetooth output	Switch output to speaker

Why is my online timer alarm not ringing?