Make time audible.
A different, unmistakable one-second sound at every interval.
Try the library
Offline installation pending.
Phone locked? Here’s what to expect.
The timer plays a continuous audio track, with silence between cues. This gives it a better chance of continuing in the background than a web timer. Start it with a tap and leave playback running. Audio controls may appear on your lock screen.
Not a guaranteed alarm: iOS, Android, battery saving, interruptions, and browser policies can suspend playback. Test a short session on your own phone with the screen locked before relying on it. If playback pauses, time pauses too; resume from the audio controls. For guaranteed locked-phone alarms, a native app is needed.
Use your browser’s “Add to Home Screen” or “Install app” option. After the offline-ready message appears, this app needs no network. Settings stay on this device; no accounts, tracking, or uploads.