Classroom Timer
Noise meter
Microphone is off
–no warnings
Sound is measured on this device only. Nothing is recorded or sent anywhere, and the microphone turns off when you press Stop or leave.
Open the full-screen noise meterRandom groups
Timers children can read
The visual timer shows time as a coloured disc that shrinks as it runs, so younger students see how much is left without reading numbers. The sand timer is a calm alternative for quiet work. Choose a gentle chime that does not startle the room.
Board mode hides every button and fills the projector with the timer. Press Esc to bring the controls back.
Noise meter and groups
The noise meter listens through the laptop microphone and shows the room level as a bar. Set a limit, and when the class goes over it the screen asks for quiet. Nothing is recorded or sent anywhere.
Paste your class list and split it into random groups of any size in one tap.
Questions
Do I need an account?
No. Everything works without login, and your class list stays in this browser.
Does the noise meter record the class?
No. It only measures the sound level on your device. No audio is stored or uploaded.
Will it work on an interactive whiteboard?
Yes. Open the page in the board's browser and use board mode for fullscreen.