They might wear a special watch on their wrist, shoes on their feet or use different apps on their phone to measure their movements.

This could be applied to the outside of a curved phone in place of a keyboard, or used to control a device in the form of a flexible wrist-band.

Unwittingly, dependence on smart phones make a person's posture changes. Her body tends to bend and often stiff neck. This condition is also spreading to the wrist.