How to use
- Open this page on an Android phone or tablet.
- Turn off silent and do-not-disturb modes if nothing happens.
- Try the patterns. Each pulse should feel crisp and even.
- Use a custom pattern to test long runs or very short pulses.
Frequently asked questions
It does not work on my iPhone.
Safari on iPhone and iPad does not let websites control vibration. There is no workaround in the browser.
The vibration buzzes or rattles.
A rattle usually means the motor or its mount is loose. A weaker-than-usual pulse can mean a worn motor.