Silent, visual and vibrating timers
Sound isn't always an option. These timers signal with a full-screen colour flash, a phone vibration, or a large visual countdown instead — and there's an extra-loud option for the opposite problem.
Use a silent timer in a library, shared office or sleeping house; a vibration timer when the phone is in a pocket; a large visual countdown when a whole room needs to see the time left; and the loud alarm timer when the kitchen or workshop is noisy.
No-sound alerts
Screen flash and haptics instead of an alarm.
Visual countdowns for a room
Big digits and colour phases everyone can read.
When you need it louder
For noisy rooms or when you walk away.
Guides for this topic
- Using a Classroom Timer Without Stressing the Room
Practical ways teachers use a visible countdown for transitions, group work, tests and quiet time — and how to avoid making the clock the enemy.
Frequently asked questions
How does the silent timer tell me time is up?
The whole screen flashes red for several seconds and the digits turn red. No sound plays at any point, so it's safe in a quiet room.
Does the vibration timer work on iPhone?
Vibration relies on the browser's Vibration API, which Android browsers support and iOS Safari does not. On iPhone, use the silent screen-flash timer or a loud alarm instead.
Can students at the back of a classroom read the countdown?
Yes. The classroom timer uses oversized digits and turns amber then red in the final seconds, which reads clearly from across a room or on a projector.