It happens without you.

So wear the thing that catches it.

Nail biting

A buzz before the bite, and a count that goes down.

A buzz when your hand finds your hair, while you still have the choice.

A buzz at the first touch. See when it happens and what sets it off.

Count it first. Turn on the buzz when you're ready.

Detection depends on how the band is worn and how your hand moves, and may vary between people and activities.
Battery life and charge time depend on settings and usage.
Habitloop is available for pre-order. Specifications, features and timing are design targets and may change before shipping.
Habitloop is a wellness product, not a medical device. It is not intended to diagnose, treat, cure, mitigate or prevent any disease or condition. If a habit is causing you injury or distress, talk to a doctor or therapist.
App screens are illustrative. Product renders are renders.